Venerology — MCQs

Q: Which of the following is NOT a feature of chancroid?

Typically indurated ulcer. **Chancroid** is a sexually transmitted infection caused by the Gram-negative coccobacillus ***Haemophilus ducreyi***. Understanding its clinical presentation is crucial for differentiating it from Syphilis (the "Great Mimicker"). ### Why Option D is Correct The hallmark of Chancroid is a **non-indurated** (soft) ulcer. In contrast, **induration** (firmness/hardness at the base) is the classic feature of a **Hard Chancre** seen in Primary Syphilis (*Treponema pallidum*). Because Chancroid lacks this firmness, it is often referred to as a "Soft Chancre." ### Explanation of Incorrect Options * **A. Ulcer bleeds easily:** Chancroidal ulcers have a friable base covered with a gray or yellow purulent exudate. When the base is scraped or touched, it bleeds easily. * **B. Painful ulcer:** This is the most important clinical differentiator from Syphilis. Chancroid ulcers are **exquisitely painful**, whereas Syphilitic chancre is typically painless. * **C. Bubo formation:** In about 50% of cases, patients develop painful, inflammatory inguinal lymphadenopathy. These can become fluctuant and are termed **buboes**, which may rupture spontaneously. ### NEET-PG High-Yield Pearls * **School of Fish Appearance:** On Gram stain, *H. ducreyi* shows a characteristic "railroad track" or "school of fish" arrangement. * **The "P" Rule:** Remember **Chancroid = Painful** (both the ulcer and the lymph nodes). * **Autoinoculation:** Multiple ulcers are common in Chancroid due to autoinoculation ("kissing ulcers"). * **Treatment:** The CDC recommended treatment is a single dose of **Azithromycin (1g orally)** or Ceftriaxone (250mg IM).

Q: A young male presents with painless induration of the penis and enlarged, non-tender genital lymph nodes. What is the most likely cause?

Primary syphilis. ### Explanation The clinical presentation of a **painless, indurated ulcer** (chancre) [2] associated with **painless, non-tender regional lymphadenopathy** is the classic hallmark of **Primary Syphilis**, caused by the spirochete *Treponema pallidum*. #### Why Primary Syphilis is Correct: * **The Chancre:** It typically begins as a papule that erodes into a clean-based ulcer. The key diagnostic feature is **induration** (a button-like firmness) and the complete **absence of pain** [2]. * **Lymphadenopathy:** The associated inguinal lymph nodes are typically bilateral, firm, discrete, and characteristically **painless** (often referred to as "shotty" nodes) [2]. #### Why Other Options are Incorrect: * **Chancroid (*Haemophilus ducreyi*):** Presents with a **painful**, soft ulcer with ragged edges. The associated lymphadenopathy (bubo) is also exquisitely painful and may suppurate. * **Herpes Genitalis (HSV-2):** Presents as multiple, small, **painful vesicles** on an erythematous base that rupture to form shallow ulcers [1]. It is often associated with systemic symptoms (fever, malaise). * **Donovanosis (Granuloma Inguinale):** Caused by *Klebsiella granulomatis*. It presents as beefy-red, velvety, **painless** ulcers that bleed easily on touch. Crucially, there is **no true lymphadenopathy**, though "pseudobuboes" (subcutaneous granulation tissue) may occur. #### NEET-PG High-Yield Pearls: * **Gold Standard Diagnosis:** Dark-field microscopy (shows corkscrew motility of spirochetes). * **Screening vs. Confirmatory:** VDRL/RPR are non-specific screening tests; FTA-ABS/TPHA are specific treponemal confirmatory tests. * **Treatment of Choice:** Benzathine Penicillin G (2.4 million units IM, single dose). * **Jarisch-Herxheimer Reaction:** An acute febrile reaction occurring within 24 hours of starting penicillin treatment for syphilis.

Q: What is the recommended treatment for secondary syphilis?

Benzathine penicillin G 2.4 million units intramuscularly single dose. The treatment of syphilis is categorized based on the duration of infection. **Secondary syphilis**, along with primary and early latent syphilis (infection <1 year), is characterized by a high bacterial load but rapid clearance with adequate penicillin levels. **1. Why Option B is Correct:** The standard of care for early syphilis (Primary, Secondary, and Early Latent) is a **single dose of Benzathine Penicillin G (2.4 million units IM)**. *Treponema pallidum* is highly sensitive to penicillin; a single injection provides sustained treponemicidal blood levels for 7–10 days, which is sufficient to cure the infection in immunocompetent individuals. **2. Why Other Options are Incorrect:** * **Option A:** This "3-dose weekly" regimen is the treatment for **Late Latent syphilis**, syphilis of unknown duration, or Tertiary syphilis (excluding neurosyphilis). It is unnecessary for secondary syphilis. * **Options C & D:** These are not standard dosing schedules for any stage of syphilis. Penicillin G Benzathine is a long-acting repository form; "twice weekly" or "twice daily" dosing would lead to toxicity and does not align with the pharmacokinetics of the drug. **3. NEET-PG High-Yield Pearls:** * **Drug of Choice:** Penicillin remains the gold standard. No documented resistance has been found in *T. pallidum*. * **Penicillin Allergy:** In non-pregnant patients, **Doxycycline (100 mg BID for 14 days)** is the preferred alternative. * **Jarisch-Herxheimer Reaction:** This is an acute febrile reaction occurring within 24 hours of starting treatment (most common in secondary syphilis). It is managed with antipyretics, not by stopping treatment. * **Follow-up:** Success is defined by a four-fold decline in non-treponemal titers (RPR/VDRL) [1] at 6 and 12 months.

Q: A 35-year-old sailor presents with painful, flocculent masses in his groin. Physical examination reveals multiple enlarged, abscessed lymph nodes with draining indolent sinuses. The patient recalls a prior small papular lesion on his penis that resolved spontaneously. What is the most likely diagnosis?

Lymphogranuloma venereum. ### **Explanation** The clinical presentation is classic for **Lymphogranuloma venereum (LGV)**, caused by *Chlamydia trachomatis* serovars L1, L2, and L3 [1]. **1. Why the correct answer is right:** LGV typically progresses through three stages [1]. The patient’s history of a **painless, self-healing primary papule** (Stage 1) followed by the development of painful, fluctuant inguinal lymphadenopathy (Stage 2) is pathognomonic [1]. The "flocculent masses" and **draining indolent sinuses** represent ruptured "buboes." A key diagnostic feature often mentioned in exams is the **"Groove sign,"** where the inguinal ligament divides the matted lymph nodes [1]. **2. Why the incorrect options are wrong:** * **Condyloma acuminatum:** Caused by HPV 6 and 11; presents as painless, cauliflower-like warts, not abscessed lymph nodes [3]. * **Granuloma inguinale (Donovanosis):** Caused by *Klebsiella granulomatis*. It presents as **painless**, beefy-red ulcerative lesions that bleed on touch. It lacks true lymphadenopathy (presents with "pseudobuboes") [1]. * **Herpes virus infection (HSV-2):** Presents with multiple, painful, grouped vesicles on an erythematous base [2]. While it causes lymphadenopathy, it does not typically lead to fluctuant, draining buboes or indolent sinuses. **3. NEET-PG High-Yield Pearls:** * **Organism:** *Chlamydia trachomatis* (L1-L3). * **Drug of Choice:** Doxycycline (100 mg BID for 21 days). Erythromycin is the alternative for pregnant patients. * **Diagnostic Sign:** **Groove Sign of Greenblatt** (inguinal ligament indentation). * **Histology:** Stellated abscesses (star-shaped necrosis) within the lymph nodes [1]. * **Late Complication:** "Esthiomene" (chronic hypertrophic ulceration and edema of external genitalia) [1].

Q: Calymmatobacterium granulomatosis causes which of the following conditions?

Granuloma inguinale (Donovanosis). **Explanation:** **Granuloma inguinale**, also known as **Donovanosis**, is a chronic bacterial sexually transmitted infection caused by ***Klebsiella granulomatis*** (formerly known as *Calymmatobacterium granulomatosis*). It is characterized by painless, beefy-red, velvety ulcerative lesions that are highly vascular and bleed easily on touch. A hallmark of this condition is the absence of true inguinal lymphadenopathy; instead, patients develop "pseudobuboes" due to subcutaneous granulation tissue. **Analysis of Options:** * **Option A: Lymphogranuloma venereum (LGV):** This is caused by *Chlamydia trachomatis* (serotypes L1, L2, and L3). It typically presents with a transient primary lesion followed by painful inguinal lymphadenopathy (the "Groove sign"). * **Option C: Syphilis:** This is caused by the spirochete *Treponema pallidum*. Primary syphilis presents as a "Hard Chancre"—a single, painless, indurated ulcer with clean base and associated painless regional lymphadenopathy. * **Option D:** Incorrect, as Option B is the established causative agent. **High-Yield Clinical Pearls for NEET-PG:** * **Microscopy:** Diagnosis is confirmed by identifying **Donovan bodies** (safety-pin appearance) within large mononuclear cells (macrophages) on a Wright-Giemsa stain. * **Clinical Feature:** "Beefy red" ulcers that are non-tender. * **Treatment of Choice:** Azithromycin (1g orally once a week or 500mg daily) for at least 3 weeks or until lesions heal. * **Nomenclature Note:** Remember the name change from *Calymmatobacterium* to *Klebsiella granulomatis* based on phylogenetic similarity.

Q: Genital elephantiasis is caused by which of the following?

Lymphogranuloma venereum. **Explanation:** **Lymphogranuloma venereum (LGV)** is a sexually transmitted infection caused by **Chlamydia trachomatis serotypes L1, L2, and L3**. The pathogenesis involves the spread of the organism from the primary site of infection to the regional lymphatics. Chronic infection leads to progressive lymphangitis, perilymphangitis, and lymphatic obstruction. This obstruction results in chronic lymphedema and subsequent fibrosis of the genital tissues, a condition known as **Esthiomene** (genital elephantiasis) [1]. It is often associated with the "Groove sign" (enlargement of inguinal nodes above and below the inguinal ligament) [1]. **Why other options are incorrect:** * **Herpes genitalis (HSV-2):** Typically presents with painful, fluid-filled vesicles and shallow ulcers. It does not cause chronic lymphatic obstruction or elephantiasis. * **Gonorrhea (N. gonorrhoeae):** Primarily causes urethritis, cervicitis, or pelvic inflammatory disease (PID). While it can cause local inflammation, it does not lead to chronic genital lymphedema. * **Syphilis (T. pallidum):** Characterized by a painless chancre (Primary), generalized rash (Secondary), or gummas (Tertiary). While it can cause "edema indurativum" (painless swelling of the labia or prepuce), it does not progress to true elephantiasis. **High-Yield Clinical Pearls for NEET-PG:** 1. **Esthiomene:** The specific term for the hypertrophic, ulcerated, and edematous state of the female external genitalia in chronic LGV. 2. **Groove Sign (Greenblatt’s Sign):** Pathognomonic for LGV; caused by the inguinal ligament dividing matted lymph nodes [1]. 3. **Treatment of Choice:** Doxycycline (100 mg twice daily for 21 days). Erythromycin is the alternative for pregnant patients. 4. **Differential Diagnosis:** Genital elephantiasis can also be caused by **Filariasis** (Wuchereria bancrofti) and **Donovanosis** (Granuloma inguinale), though LGV is the classic venereal cause [1].

Q: A 20-year-old male develops multiple tender, bleeding, nonindurated ulcers over the prepuce and glans, which are painful. He also has suppurative lymphadenopathy, presenting 5 days after sexual intercourse with a sex worker. What is the most probable diagnosis?

Chancroid. **Explanation:** The clinical presentation of **multiple, painful, non-indurated (soft) ulcers** with a **short incubation period** (5 days) and **suppurative lymphadenopathy** (buboes) is classic for **Chancroid**, caused by *Haemophilus ducreyi* [1]. **1. Why Chancroid is correct:** * **Ulcer Characteristics:** Unlike Syphilis (which is painless and indurated), Chancroid ulcers are "soft," extremely tender, and bleed easily upon manipulation [1]. * **Lymphadenopathy:** It typically causes unilateral, painful, fluctuant inguinal lymph nodes (buboes) that may rupture spontaneously [1]. * **Incubation:** The short duration (3–7 days) fits the timeline provided [1]. **2. Why other options are incorrect:** * **Lymphogranuloma venereum (LGV):** Caused by *Chlamydia trachomatis* (L1-L3). The primary ulcer is usually small, painless, and transient (often missed) [1]. * **Herpes Genitalis (HSV-2):** Presents as multiple small, grouped vesicles on an erythematous base that rupture to form shallow ulcers. While painful, they do not typically present with large suppurative buboes [1]. * **Molluscum Contagiosum:** Caused by Poxvirus. It presents as painless, pearly, umbilicated papules, not bleeding ulcers or suppurative lymphadenopathy. **Clinical Pearls for NEET-PG:** * **Microscopy:** *H. ducreyi* shows a characteristic **"School of fish"** or "Railroad track" appearance on Gram stain. * **Treatment:** A single dose of **Azithromycin (1g)** or Ceftriaxone (250mg IM). * **Mnemonic:** "He **do cry** because it's painful" (*H. ducreyi*). * **Syphilis vs. Chancroid:** Syphilis = Painless/Hard; Chancroid = Painful/Soft.

Q: A 30-year-old pregnant female in her third trimester (36 weeks) presents with fever, swollen lymph nodes, sore throat, and a characteristic rash on her palms and soles. A serological screening test was positive. Which of the following abnormalities is most likely to be found in the newborn child?

Congenital syphilis (Hutchinson's triad: interstitial keratitis, notching of incisors, and neurosyphilis). ### Explanation **Correct Option: A (Congenital Syphilis)** The clinical presentation of fever, lymphadenopathy, sore throat, and a **maculopapular rash involving the palms and soles** is classic for **Secondary Syphilis** [1]. In a pregnant female, *Treponema pallidum* can cross the placenta at any stage of pregnancy. If left untreated, it leads to **Congenital Syphilis**. The classic late manifestation (seen after age 2) is **Hutchinson’s Triad**, which consists of: 1. **Hutchinson’s teeth** (notched incisors) 2. **Interstitial keratitis** 3. **Eighth nerve deafness** (Note: The option mentions neurosyphilis, which is also a major component of late congenital syphilis). **Why Incorrect Options are Wrong:** * **B (Congenital Rubella):** Characterized by the "Gregg Triad" (Cataracts, Sensorineural deafness, and PDA). The mother would typically present with a cephalocaudal rash and post-auricular lymphadenopathy, not palm/sole rashes. * **C (Toxoplasmosis):** Characterized by the "Sabin Triad" (Chorioretinitis, Hydrocephalus, and Intracranial calcifications). It is usually transmitted via cat feces or undercooked meat. * **D (CMV):** The most common congenital infection; presents with periventricular calcifications and microcephaly. It does not present with the specific palmar rash seen in syphilis. **High-Yield Clinical Pearls for NEET-PG:** * **Screening:** VDRL/RPR are used for screening; TPHA/FTA-ABS are confirmatory. * **Early Congenital Syphilis ( 2 years):** Includes Mulberry molars, Saber shins, Clutton’s joints, and Saddle nose deformity. * **Treatment:** Penicillin G is the drug of choice, even in pregnancy (desensitize if allergic).

A 35-year-old sailor presents with painful, flocculent masses in his groin. Physical examination reveals multiple enlarged, abscessed lymph nodes with draining indolent sinuses. The patient recalls a prior small papular lesion on his penis that resolved spontaneously. What is the most likely diagnosis?

Q6Easy

Calymmatobacterium granulomatosis causes which of the following conditions?

Q7Easy

Genital elephantiasis is caused by which of the following?

Q8Medium

A 20-year-old male develops multiple tender, bleeding, nonindurated ulcers over the prepuce and glans, which are painful. He also has suppurative lymphadenopathy, presenting 5 days after sexual intercourse with a sex worker. What is the most probable diagnosis?

Q9Medium

A 30-year-old pregnant female in her third trimester (36 weeks) presents with fever, swollen lymph nodes, sore throat, and a characteristic rash on her palms and soles. A serological screening test was positive. Which of the following abnormalities is most likely to be found in the newborn child?

Q10Medium

All of the following are true regarding the treatment of Syphilis, except:

Venerology Indian Medical PG Practice Questions and MCQs

Question 1: Which of the following is NOT a feature of chancroid?

A. Ulcer bleeds easily
B. Painful ulcer
C. Bubo formation
D. Typically indurated ulcer (Correct Answer)

Explanation: **Chancroid** is a sexually transmitted infection caused by the Gram-negative coccobacillus ***Haemophilus ducreyi***. Understanding its clinical presentation is crucial for differentiating it from Syphilis (the "Great Mimicker"). ### Why Option D is Correct The hallmark of Chancroid is a **non-indurated** (soft) ulcer. In contrast, **induration** (firmness/hardness at the base) is the classic feature of a **Hard Chancre** seen in Primary Syphilis (*Treponema pallidum*). Because Chancroid lacks this firmness, it is often referred to as a "Soft Chancre." ### Explanation of Incorrect Options * **A. Ulcer bleeds easily:** Chancroidal ulcers have a friable base covered with a gray or yellow purulent exudate. When the base is scraped or touched, it bleeds easily. * **B. Painful ulcer:** This is the most important clinical differentiator from Syphilis. Chancroid ulcers are **exquisitely painful**, whereas Syphilitic chancre is typically painless. * **C. Bubo formation:** In about 50% of cases, patients develop painful, inflammatory inguinal lymphadenopathy. These can become fluctuant and are termed **buboes**, which may rupture spontaneously. ### NEET-PG High-Yield Pearls * **School of Fish Appearance:** On Gram stain, *H. ducreyi* shows a characteristic "railroad track" or "school of fish" arrangement. * **The "P" Rule:** Remember **Chancroid = Painful** (both the ulcer and the lymph nodes). * **Autoinoculation:** Multiple ulcers are common in Chancroid due to autoinoculation ("kissing ulcers"). * **Treatment:** The CDC recommended treatment is a single dose of **Azithromycin (1g orally)** or Ceftriaxone (250mg IM).

Question 2: A young male presents with painless induration of the penis and enlarged, non-tender genital lymph nodes. What is the most likely cause?

A. Chancroid
B. Herpes genitalis
C. Primary syphilis (Correct Answer)
D. Donovanosis

Explanation: ### Explanation The clinical presentation of a **painless, indurated ulcer** (chancre) [2] associated with **painless, non-tender regional lymphadenopathy** is the classic hallmark of **Primary Syphilis**, caused by the spirochete *Treponema pallidum*. #### Why Primary Syphilis is Correct: * **The Chancre:** It typically begins as a papule that erodes into a clean-based ulcer. The key diagnostic feature is **induration** (a button-like firmness) and the complete **absence of pain** [2]. * **Lymphadenopathy:** The associated inguinal lymph nodes are typically bilateral, firm, discrete, and characteristically **painless** (often referred to as "shotty" nodes) [2]. #### Why Other Options are Incorrect: * **Chancroid (*Haemophilus ducreyi*):** Presents with a **painful**, soft ulcer with ragged edges. The associated lymphadenopathy (bubo) is also exquisitely painful and may suppurate. * **Herpes Genitalis (HSV-2):** Presents as multiple, small, **painful vesicles** on an erythematous base that rupture to form shallow ulcers [1]. It is often associated with systemic symptoms (fever, malaise). * **Donovanosis (Granuloma Inguinale):** Caused by *Klebsiella granulomatis*. It presents as beefy-red, velvety, **painless** ulcers that bleed easily on touch. Crucially, there is **no true lymphadenopathy**, though "pseudobuboes" (subcutaneous granulation tissue) may occur. #### NEET-PG High-Yield Pearls: * **Gold Standard Diagnosis:** Dark-field microscopy (shows corkscrew motility of spirochetes). * **Screening vs. Confirmatory:** VDRL/RPR are non-specific screening tests; FTA-ABS/TPHA are specific treponemal confirmatory tests. * **Treatment of Choice:** Benzathine Penicillin G (2.4 million units IM, single dose). * **Jarisch-Herxheimer Reaction:** An acute febrile reaction occurring within 24 hours of starting penicillin treatment for syphilis.

Question 3: What is the worldwide accepted minimum dose of penicillin for latent syphilis?

A. 4.8 million units
B. 6.0 million units
C. 7.0 million units (Correct Answer)
D. 10 units

Explanation: The treatment of syphilis is categorized based on the duration of infection. For **Latent Syphilis** (specifically late latent syphilis or syphilis of unknown duration), the worldwide standard of care is based on the **CDC and WHO guidelines**. **1. Why 7.2 Million Units (Option C) is Correct:** The recommended regimen for late latent syphilis is **Benzathine Penicillin G (BPG)** at a dose of **2.4 million units intramuscularly (IM) once weekly for three consecutive weeks**. * Calculation: $2.4 \text{ million units} \times 3 \text{ doses} = \mathbf{7.2 \text{ million units}}$. * *Note:* While the option says "7.0 million," it refers to the cumulative total of the three-dose regimen (7.2 million units), which is the minimum required to ensure treponemicidal levels are maintained over a sufficient period to account for the slower replication rate of *Treponema pallidum* in late stages. **2. Why Incorrect Options are Wrong:** * **Option A (4.8 million units):** This would represent only two doses. This is insufficient for late latent syphilis, as it does not provide the necessary 21-day coverage. * **Option B (6.0 million units):** This is not a standard cumulative dose for any syphilis protocol. * **Option D (10 units):** This is a sub-therapeutic dose with no clinical relevance. **3. High-Yield Clinical Pearls for NEET-PG:** * **Early Syphilis** (Primary, Secondary, or Early Latent <1 year): A **single dose** of 2.4 million units of Benzathine Penicillin G is sufficient. * **Neurosyphilis:** Requires **Aqueous Crystalline Penicillin G** (18–24 million units per day, administered IV) for 10–14 days. * **Jarisch-Herxheimer Reaction:** An acute febrile reaction occurring within 24 hours of starting treatment (most common in secondary syphilis). It is managed with antipyretics, not by stopping penicillin. * **Drug of Choice:** Penicillin remains the gold standard [1]; for penicillin-allergic non-pregnant patients, Doxycycline (100 mg BID for 28 days) is the alternative for late latent syphilis.

Question 4: What is the recommended treatment for secondary syphilis?

A. Benzathine penicillin G 2.4 million units intramuscularly weekly for 3 doses
B. Benzathine penicillin G 2.4 million units intramuscularly single dose (Correct Answer)
C. Benzathine penicillin G 2.4 million units intramuscularly twice weekly for 4 doses
D. Benzathine penicillin G 2.4 million units intramuscularly twice daily for 2 weeks

Explanation: The treatment of syphilis is categorized based on the duration of infection. **Secondary syphilis**, along with primary and early latent syphilis (infection <1 year), is characterized by a high bacterial load but rapid clearance with adequate penicillin levels. **1. Why Option B is Correct:** The standard of care for early syphilis (Primary, Secondary, and Early Latent) is a **single dose of Benzathine Penicillin G (2.4 million units IM)**. *Treponema pallidum* is highly sensitive to penicillin; a single injection provides sustained treponemicidal blood levels for 7–10 days, which is sufficient to cure the infection in immunocompetent individuals. **2. Why Other Options are Incorrect:** * **Option A:** This "3-dose weekly" regimen is the treatment for **Late Latent syphilis**, syphilis of unknown duration, or Tertiary syphilis (excluding neurosyphilis). It is unnecessary for secondary syphilis. * **Options C & D:** These are not standard dosing schedules for any stage of syphilis. Penicillin G Benzathine is a long-acting repository form; "twice weekly" or "twice daily" dosing would lead to toxicity and does not align with the pharmacokinetics of the drug. **3. NEET-PG High-Yield Pearls:** * **Drug of Choice:** Penicillin remains the gold standard. No documented resistance has been found in *T. pallidum*. * **Penicillin Allergy:** In non-pregnant patients, **Doxycycline (100 mg BID for 14 days)** is the preferred alternative. * **Jarisch-Herxheimer Reaction:** This is an acute febrile reaction occurring within 24 hours of starting treatment (most common in secondary syphilis). It is managed with antipyretics, not by stopping treatment. * **Follow-up:** Success is defined by a four-fold decline in non-treponemal titers (RPR/VDRL) [1] at 6 and 12 months.

Question 5: A 35-year-old sailor presents with painful, flocculent masses in his groin. Physical examination reveals multiple enlarged, abscessed lymph nodes with draining indolent sinuses. The patient recalls a prior small papular lesion on his penis that resolved spontaneously. What is the most likely diagnosis?

A. Condyloma acuminatum
B. Granuloma inguinale
C. Herpes virus infection
D. Lymphogranuloma venereum (Correct Answer)

Explanation: ### **Explanation** The clinical presentation is classic for **Lymphogranuloma venereum (LGV)**, caused by *Chlamydia trachomatis* serovars L1, L2, and L3 [1]. **1. Why the correct answer is right:** LGV typically progresses through three stages [1]. The patient’s history of a **painless, self-healing primary papule** (Stage 1) followed by the development of painful, fluctuant inguinal lymphadenopathy (Stage 2) is pathognomonic [1]. The "flocculent masses" and **draining indolent sinuses** represent ruptured "buboes." A key diagnostic feature often mentioned in exams is the **"Groove sign,"** where the inguinal ligament divides the matted lymph nodes [1]. **2. Why the incorrect options are wrong:** * **Condyloma acuminatum:** Caused by HPV 6 and 11; presents as painless, cauliflower-like warts, not abscessed lymph nodes [3]. * **Granuloma inguinale (Donovanosis):** Caused by *Klebsiella granulomatis*. It presents as **painless**, beefy-red ulcerative lesions that bleed on touch. It lacks true lymphadenopathy (presents with "pseudobuboes") [1]. * **Herpes virus infection (HSV-2):** Presents with multiple, painful, grouped vesicles on an erythematous base [2]. While it causes lymphadenopathy, it does not typically lead to fluctuant, draining buboes or indolent sinuses. **3. NEET-PG High-Yield Pearls:** * **Organism:** *Chlamydia trachomatis* (L1-L3). * **Drug of Choice:** Doxycycline (100 mg BID for 21 days). Erythromycin is the alternative for pregnant patients. * **Diagnostic Sign:** **Groove Sign of Greenblatt** (inguinal ligament indentation). * **Histology:** Stellated abscesses (star-shaped necrosis) within the lymph nodes [1]. * **Late Complication:** "Esthiomene" (chronic hypertrophic ulceration and edema of external genitalia) [1].

Question 6: Calymmatobacterium granulomatosis causes which of the following conditions?

A. Lymphogranuloma venereum
B. Granuloma inguinale (Donovanosis) (Correct Answer)
C. Syphilis
D. None of the above

Explanation: **Explanation:** **Granuloma inguinale**, also known as **Donovanosis**, is a chronic bacterial sexually transmitted infection caused by ***Klebsiella granulomatis*** (formerly known as *Calymmatobacterium granulomatosis*). It is characterized by painless, beefy-red, velvety ulcerative lesions that are highly vascular and bleed easily on touch. A hallmark of this condition is the absence of true inguinal lymphadenopathy; instead, patients develop "pseudobuboes" due to subcutaneous granulation tissue. **Analysis of Options:** * **Option A: Lymphogranuloma venereum (LGV):** This is caused by *Chlamydia trachomatis* (serotypes L1, L2, and L3). It typically presents with a transient primary lesion followed by painful inguinal lymphadenopathy (the "Groove sign"). * **Option C: Syphilis:** This is caused by the spirochete *Treponema pallidum*. Primary syphilis presents as a "Hard Chancre"—a single, painless, indurated ulcer with clean base and associated painless regional lymphadenopathy. * **Option D:** Incorrect, as Option B is the established causative agent. **High-Yield Clinical Pearls for NEET-PG:** * **Microscopy:** Diagnosis is confirmed by identifying **Donovan bodies** (safety-pin appearance) within large mononuclear cells (macrophages) on a Wright-Giemsa stain. * **Clinical Feature:** "Beefy red" ulcers that are non-tender. * **Treatment of Choice:** Azithromycin (1g orally once a week or 500mg daily) for at least 3 weeks or until lesions heal. * **Nomenclature Note:** Remember the name change from *Calymmatobacterium* to *Klebsiella granulomatis* based on phylogenetic similarity.

Question 7: Genital elephantiasis is caused by which of the following?

A. Herpes genitalis
B. Lymphogranuloma venereum (Correct Answer)
C. Gonorrhea
D. Syphilis

Explanation: **Explanation:** **Lymphogranuloma venereum (LGV)** is a sexually transmitted infection caused by **Chlamydia trachomatis serotypes L1, L2, and L3**. The pathogenesis involves the spread of the organism from the primary site of infection to the regional lymphatics. Chronic infection leads to progressive lymphangitis, perilymphangitis, and lymphatic obstruction. This obstruction results in chronic lymphedema and subsequent fibrosis of the genital tissues, a condition known as **Esthiomene** (genital elephantiasis) [1]. It is often associated with the "Groove sign" (enlargement of inguinal nodes above and below the inguinal ligament) [1]. **Why other options are incorrect:** * **Herpes genitalis (HSV-2):** Typically presents with painful, fluid-filled vesicles and shallow ulcers. It does not cause chronic lymphatic obstruction or elephantiasis. * **Gonorrhea (N. gonorrhoeae):** Primarily causes urethritis, cervicitis, or pelvic inflammatory disease (PID). While it can cause local inflammation, it does not lead to chronic genital lymphedema. * **Syphilis (T. pallidum):** Characterized by a painless chancre (Primary), generalized rash (Secondary), or gummas (Tertiary). While it can cause "edema indurativum" (painless swelling of the labia or prepuce), it does not progress to true elephantiasis. **High-Yield Clinical Pearls for NEET-PG:** 1. **Esthiomene:** The specific term for the hypertrophic, ulcerated, and edematous state of the female external genitalia in chronic LGV. 2. **Groove Sign (Greenblatt’s Sign):** Pathognomonic for LGV; caused by the inguinal ligament dividing matted lymph nodes [1]. 3. **Treatment of Choice:** Doxycycline (100 mg twice daily for 21 days). Erythromycin is the alternative for pregnant patients. 4. **Differential Diagnosis:** Genital elephantiasis can also be caused by **Filariasis** (Wuchereria bancrofti) and **Donovanosis** (Granuloma inguinale), though LGV is the classic venereal cause [1].

Question 8: A 20-year-old male develops multiple tender, bleeding, nonindurated ulcers over the prepuce and glans, which are painful. He also has suppurative lymphadenopathy, presenting 5 days after sexual intercourse with a sex worker. What is the most probable diagnosis?

A. Lymphogranuloma venereum (LGV)
B. Herpes genitalis
C. Molluscum contagiosum
D. Chancroid (Correct Answer)

Explanation: **Explanation:** The clinical presentation of **multiple, painful, non-indurated (soft) ulcers** with a **short incubation period** (5 days) and **suppurative lymphadenopathy** (buboes) is classic for **Chancroid**, caused by *Haemophilus ducreyi* [1]. **1. Why Chancroid is correct:** * **Ulcer Characteristics:** Unlike Syphilis (which is painless and indurated), Chancroid ulcers are "soft," extremely tender, and bleed easily upon manipulation [1]. * **Lymphadenopathy:** It typically causes unilateral, painful, fluctuant inguinal lymph nodes (buboes) that may rupture spontaneously [1]. * **Incubation:** The short duration (3–7 days) fits the timeline provided [1]. **2. Why other options are incorrect:** * **Lymphogranuloma venereum (LGV):** Caused by *Chlamydia trachomatis* (L1-L3). The primary ulcer is usually small, painless, and transient (often missed) [1]. * **Herpes Genitalis (HSV-2):** Presents as multiple small, grouped vesicles on an erythematous base that rupture to form shallow ulcers. While painful, they do not typically present with large suppurative buboes [1]. * **Molluscum Contagiosum:** Caused by Poxvirus. It presents as painless, pearly, umbilicated papules, not bleeding ulcers or suppurative lymphadenopathy. **Clinical Pearls for NEET-PG:** * **Microscopy:** *H. ducreyi* shows a characteristic **"School of fish"** or "Railroad track" appearance on Gram stain. * **Treatment:** A single dose of **Azithromycin (1g)** or Ceftriaxone (250mg IM). * **Mnemonic:** "He **do cry** because it's painful" (*H. ducreyi*). * **Syphilis vs. Chancroid:** Syphilis = Painless/Hard; Chancroid = Painful/Soft.

Question 9: A 30-year-old pregnant female in her third trimester (36 weeks) presents with fever, swollen lymph nodes, sore throat, and a characteristic rash on her palms and soles. A serological screening test was positive. Which of the following abnormalities is most likely to be found in the newborn child?

A. Congenital syphilis (Hutchinson's triad: interstitial keratitis, notching of incisors, and neurosyphilis) (Correct Answer)
B. Congenital rubella syndrome (Deafness, cataracts, and cardiac defects)
C. Congenital toxoplasmosis (Chorioretinitis, hydrocephalus, and intracranial calcifications)
D. Congenital cytomegalovirus infection (Microcephaly, chorioretinitis, and hearing loss)

Explanation: ### Explanation **Correct Option: A (Congenital Syphilis)** The clinical presentation of fever, lymphadenopathy, sore throat, and a **maculopapular rash involving the palms and soles** is classic for **Secondary Syphilis** [1]. In a pregnant female, *Treponema pallidum* can cross the placenta at any stage of pregnancy. If left untreated, it leads to **Congenital Syphilis**. The classic late manifestation (seen after age 2) is **Hutchinson’s Triad**, which consists of: 1. **Hutchinson’s teeth** (notched incisors) 2. **Interstitial keratitis** 3. **Eighth nerve deafness** (Note: The option mentions neurosyphilis, which is also a major component of late congenital syphilis). **Why Incorrect Options are Wrong:** * **B (Congenital Rubella):** Characterized by the "Gregg Triad" (Cataracts, Sensorineural deafness, and PDA). The mother would typically present with a cephalocaudal rash and post-auricular lymphadenopathy, not palm/sole rashes. * **C (Toxoplasmosis):** Characterized by the "Sabin Triad" (Chorioretinitis, Hydrocephalus, and Intracranial calcifications). It is usually transmitted via cat feces or undercooked meat. * **D (CMV):** The most common congenital infection; presents with periventricular calcifications and microcephaly. It does not present with the specific palmar rash seen in syphilis. **High-Yield Clinical Pearls for NEET-PG:** * **Screening:** VDRL/RPR are used for screening; TPHA/FTA-ABS are confirmatory. * **Early Congenital Syphilis (<2 years):** Presents with snuffles (hemorrhagic rhinitis), palm/sole bullae, and Parrot’s pseudoparalysis [1]. * **Late Congenital Syphilis (>2 years):** Includes Mulberry molars, Saber shins, Clutton’s joints, and Saddle nose deformity. * **Treatment:** Penicillin G is the drug of choice, even in pregnancy (desensitize if allergic).

Question 10: All of the following are true regarding the treatment of Syphilis, except:

A. The only acceptable treatment for syphilis in pregnancy is penicillin.
B. Early latent syphilis is treated with 2.4 million units of Benzathine penicillin administered once.
C. Late latent syphilis is treated with 2.4 million units of Benzathine penicillin administered once. (Correct Answer)
D. Neurosyphilis is treated with Aqueous penicillin G 18-24 million units intravenously daily.

Explanation: The treatment of Syphilis is a high-yield topic for NEET-PG, primarily governed by the duration of infection and the site of involvement. **1. Why Option C is the Correct Answer (The False Statement):** Late latent syphilis (infection >1 year or of unknown duration) requires a longer duration of therapy because the *Treponema pallidum* organisms divide more slowly in late stages. The standard regimen is **Benzathine Penicillin G 2.4 million units IM once weekly for 3 consecutive weeks** (total 7.2 million units). A single dose is insufficient and is only indicated for early syphilis. **2. Analysis of Other Options:** * **Option A:** Penicillin is indeed the **only** recommended treatment for syphilis in pregnancy. If a pregnant woman is allergic to penicillin, she must be **desensitized** and treated with penicillin, as other antibiotics (like Doxycycline) do not reliably cross the placenta to treat the fetus [2]. * **Option B:** Early syphilis (Primary, Secondary, or Early Latent <1 year) is characterized by rapidly multiplying spirochetes. A **single dose** of 2.4 million units of Benzathine Penicillin G provides sustained treponemicidal levels for 2 weeks, which is curative. * **Option D:** Neurosyphilis requires high CNS concentrations. Since Benzathine penicillin does not cross the blood-brain barrier effectively, **Aqueous Crystalline Penicillin G** (18–24 million units IV daily, administered as 3–4 million units every 4 hours) for 10–14 days is the gold standard [1]. **Clinical Pearls for NEET-PG:** * **Jarisch-Herxheimer Reaction:** An acute febrile reaction occurring within 24 hours of starting treatment (most common in secondary syphilis) [2]. It is managed with antipyretics, not by stopping penicillin. * **Drug of Choice:** Penicillin remains the drug of choice for all stages; no documented resistance has emerged. * **Alternative:** For non-pregnant, penicillin-allergic patients with early syphilis, **Doxycycline (100 mg BID for 14 days)** is the preferred alternative.

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