Anorectal Abscess and Fistula Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Anorectal Abscess and Fistula. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Anorectal Abscess and Fistula Indian Medical PG Question 1: A 5-month old child rushed into hospital with complaint of colicky pain, bilious vomiting and red current jelly like appearance of stools. On examination, there was a sausage shaped mass in the right lumbar region. Which of the following is the preferred modality that is used as both diagnostic and therapeutic?
- A. Air enema (Correct Answer)
- B. MRI
- C. Anoscopy
- D. Barium enema
Anorectal Abscess and Fistula Explanation: ***Air enema***
- An **air enema** can be both diagnostic and therapeutic for **intussusception**, using air pressure to reduce the telescoping bowel segment.
- The classic triad of **colicky pain, bilious vomiting, and red currant jelly stools** strongly suggests intussusception, and an air enema is often the first-line intervention.
*MRI*
- **MRI** is not typically used for the initial diagnosis or treatment of pediatric intussusception due to its long imaging times and need for sedation.
- While it can provide detailed anatomical information, it is not a **therapeutic** modality for this condition.
*Anoscopy*
- **Anoscopy** is a procedure used to visualize the anal canal and distal rectum, primarily for conditions like hemorrhoids or anal fissures.
- It is **not suitable** for diagnosing or treating intussusception, which involves a more proximal bowel obstruction.
*Barium enema*
- A **barium enema** can be diagnostic and therapeutic for intussusception, using barium solution to reduce the intussusception.
- However, **air enema** is generally preferred due to a lower risk of perforation and easier interpretation of reduction, making it the more common choice.
Anorectal Abscess and Fistula Indian Medical PG Question 2: A jeep driver presents with pain in the gluteal region along with swelling and pus discharge for the past 6 months. What is the most likely diagnosis?
- A. Fistula in ano
- B. Fissure in ano
- C. Gluteal abscess
- D. Pilonidal sinus (Correct Answer)
Anorectal Abscess and Fistula Explanation: ***Pilonidal sinus***
- This is the classic presentation of **pilonidal sinus disease**, historically known as **"Jeep disease"** due to its high incidence in military personnel during WWII who sat for prolonged periods in jeeps
- The **occupational clue "jeep driver"** is pathognomonic for pilonidal sinus, as prolonged sitting causes friction and pressure in the **sacrococcygeal/natal cleft region**
- Presents with **chronic pain, swelling, and intermittent pus discharge** in the gluteal region, typically over weeks to months
- Risk factors include: prolonged sitting, friction, deep natal cleft, obesity, and excessive body hair
- The **chronic 6-month duration** with ongoing discharge is characteristic of pilonidal sinus with secondary infection, not an acute abscess
*Gluteal abscess*
- While this can cause pain, swelling, and pus discharge, it typically presents **acutely** (days to weeks, not 6 months)
- Does not have the specific **occupational association with prolonged sitting** (jeep driver)
- Would be expected to either resolve with drainage/antibiotics or progress to sepsis, not persist chronically for 6 months
- Lacks the classic "Jeep disease" eponym
*Fistula in ano*
- This involves an abnormal tract between the **anal canal and perianal skin**
- Discharge would be localized **perianally**, close to the anus, not in the broader gluteal/sacrococcygeal region
- Does not have the jeep driver occupational association
*Fissure in ano*
- A **tear in the anal canal lining** causing severe pain during defecation with **bright red bleeding**
- Does not present with swelling or chronic pus discharge
- Pain is characteristically related to bowel movements, not constant
Anorectal Abscess and Fistula Indian Medical PG Question 3: Which of the following is a characteristic feature of Crohn's disease?
- A. Sinus & fistula (Correct Answer)
- B. Mesenteric lymphadenitis
- C. Continuous involvement
- D. Crypt abscesses
Anorectal Abscess and Fistula Explanation: ***Sinus & fistula***
- **Transmural inflammation**, a hallmark of Crohn's disease, can extend through the bowel wall, leading to the formation of **sinus tracts** and **fistulae** (abnormal connections between organs or to the skin). [1]
- These complications include enteroenteric, enterovesical, and perianal fistulae, which are highly characteristic of Crohn's. [1]
*Continuous involvement*
- Crohn's disease is characterized by **skip lesions**, meaning there are healthy segments of bowel interspersed with diseased segments, not continuous involvement. [1]
- **Ulcerative colitis** typically presents with continuous inflammation, starting from the rectum and extending proximally. [1]
*Mesenteric lymphadenitis*
- While mesenteric lymph nodes can be involved in Crohn's disease due to inflammation, **mesenteric lymphadenitis** is more commonly associated with infectious etiologies or other inflammatory conditions, and not a primary defining characteristic.
- It refers to inflammation of lymph nodes in the mesentery, which can cause abdominal pain but does not specifically differentiate Crohn's from other conditions.
*Crypt abscesses*
- **Crypt abscesses** are a characteristic histological feature of **ulcerative colitis**, where neutrophils infiltrate the glandular crypts. [1]
- While they can occasionally be seen in Crohn's, they are much more common and prominent in ulcerative colitis and are not a defining feature of Crohn's.
Anorectal Abscess and Fistula Indian Medical PG Question 4: Most common site for anal fissure is
- A. 3 O'clock
- B. 6 O'clock (Correct Answer)
- C. 2 O'clock
- D. 10 O'clock
Anorectal Abscess and Fistula Explanation: ***6 O'clock***
- The **posterior midline (6 o'clock position)** is the most common site for anal fissures, accounting for approximately **90% of all cases**.
- This location is prone to tearing due to relatively **poor blood supply** and increased **mechanical stress** during defecation.
- The posterior midline is the least supported part of the anal canal by the external anal sphincter.
- **Note**: The **anterior midline (12 o'clock position)** is the second most common site, occurring in **10-25% of women** but rarely in men.
*3 O'clock*
- The **3 o'clock position (right lateral)** is an infrequent site for anal fissures.
- Fissures in this location, especially if *lateral*, may suggest an underlying systemic disease such as **Crohn's disease**, **tuberculosis**, **HIV**, or **malignancy**.
- Atypical fissures warrant thorough investigation.
*2 O'clock*
- The **2 o'clock position (anterior-lateral)** is not typically associated with anal fissures.
- Similar to other atypical sites, a fissure here warrants investigation for secondary causes.
- Consider inflammatory bowel disease or other pathological conditions.
*10 O'clock*
- The **10 o'clock position (left lateral)** is also a less common site for anal fissures compared to the posterior midline.
- Fissures in lateral positions should raise suspicion for other conditions, such as **inflammatory bowel disease**, **tuberculosis**, **HIV**, or **malignancy**.
Anorectal Abscess and Fistula Indian Medical PG Question 5: Causative organism for ANUG is:
- A. Streptococcus sanguis
- B. Treponema pallidum and spirochetes
- C. Fusospirochetal complex (Correct Answer)
- D. Staphylococcus epidermidis
Anorectal Abscess and Fistula Explanation: ***Fusospirochetal complex***
- **Acute Necrotizing Ulcerative Gingivitis (ANUG)**, also known as Vincent's angina or trench mouth, is caused by a synergistic polymicrobial infection involving **Fusobacterium species** (particularly F. nucleatum) and **oral spirochetes** (Borrelia vincentii and Treponema species).
- This fusospirochetal complex creates a destructive, ulcerative inflammation of the gingiva, presenting with **painful, bleeding gums, punched-out papillae, pseudomembrane formation**, and characteristic **fetid breath**.
- The condition typically occurs in patients with **poor oral hygiene, stress, immunosuppression**, or **malnutrition**.
*Streptococcus sanguis*
- This bacterium is a common commensal of the oral cavity and plays a role in **dental plaque formation** and initial colonization of tooth surfaces.
- While present in the mouth, it is **not the causative agent** for the necrotizing lesions characteristic of ANUG.
*Treponema pallidum and spirochetes*
- **Treponema pallidum** specifically causes **syphilis**, a sexually transmitted infection, not ANUG.
- While **oral spirochetes** (other Treponema and Borrelia species) are indeed critical components of ANUG, they work synergistically with **Fusobacterium**, hence the term "fusospirochetal complex."
- This option is partially correct but incomplete and includes T. pallidum which is incorrect.
*Staphylococcus epidermidis*
- **Staphylococcus epidermidis** is a skin commensal organism implicated in **nosocomial infections** and biofilm formation on medical devices.
- It has **no role** in the pathogenesis of ANUG.
Anorectal Abscess and Fistula Indian Medical PG Question 6: What is the treatment of choice for anal carcinoma?
- A. Chemotherapy alone
- B. APR combined with radiotherapy
- C. Chemoradiation (Correct Answer)
- D. All of the options
Anorectal Abscess and Fistula Explanation: ***Chemoradiation***
- This combined modality is the **standard of care** for most anal carcinomas, achieving high cure rates while preserving sphincter function.
- The combination of **chemotherapy** (e.g., 5-fluorouracil and mitomycin C) and **external beam radiation** works synergistically to destroy cancer cells.
*Chemotherapy alone*
- **Chemotherapy alone** is generally insufficient as a primary treatment for anal carcinoma.
- It is often used in combination with radiation or for **metastatic disease**, but not as a monotherapy for curative intent in localized disease.
*APR combined with radiotherapy*
- **Abdominoperineal resection (APR)** combined with radiotherapy is typically reserved for **recurrent** or **persistent anal carcinoma** after failed chemoradiation, or for very advanced tumors.
- APR is a highly morbid surgery leading to a **permanent colostomy**, and primary chemoradiation aims to avoid this outcome.
*All of the options*
- As **chemoradiation** is the preferred first-line treatment and other options are either inadequate or reserved for specific situations, stating "all of the options" is incorrect.
- The treatment strategy for anal carcinoma involves a nuanced approach, prioritizing **organ preservation** with effective cancer control.
Anorectal Abscess and Fistula Indian Medical PG Question 7: Hose pipe appearance of intestine is a feature of
- A. Malabsorption syndrome
- B. Ulcerative colitis (Correct Answer)
- C. Crohn's disease
- D. Hirschsprung disease
Anorectal Abscess and Fistula Explanation: ***Crohns disease***
- The **hose pipe appearance** of the intestine on imaging is due to **transmural inflammation** and **strictures**, characteristic of Crohn's disease [1].
- This feature indicates a **narrowed lumen** due to fibrosis, often affecting the small intestine or colon [1].
*Malabsorption syndrome*
- This condition is primarily associated with **nutrient absorption issues**, not structural changes in the intestine.
- It typically presents with **diarrhea**, **weight loss**, and **malnutrition**, lacking the characteristic imaging findings.
*Ulcerative colitis*
- Usually presents with **continuous lesions** confined to the colonic mucosa, leading to ulcers and inflammation but not a **hose pipe appearance**.
- Symptoms include **bloody diarrhea** and **abdominal pain**, distinctly different from Crohn's disease.
*Hirsprung disease*
- A congenital condition causing **intestinal obstruction** due to the absence of ganglion cells, leading to **dilated proximal bowel** rather than a hose pipe appearance.
- Typically presents in infants with **severe constipation** and **abdominal distension**, unrelated to imaging features seen in Crohn's disease.
**References:**
[1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 366-367.
Anorectal Abscess and Fistula Indian Medical PG Question 8: Which of the following is the most serious complication of untreated urethral stricture?
- A. Periurethral abscess (Correct Answer)
- B. Urethral diverticulum
- C. Retention of urine
- D. All of these
Anorectal Abscess and Fistula Explanation: ***Periurethral abscess***
- An untreated urethral stricture can lead to urinary stasis and infection, which can then progress to a **periurethral abscess**.
- A periurethral abscess is a serious localized collection of pus that can rupture internally or externally, causing severe pain, infection, and potentially necessitating complex surgical intervention.
*Urethral diverticulum*
- While urethral strictures can contribute to the formation of a **urethral diverticulum** due to increased pressure and obstruction, it is generally considered a less immediate and life-threatening complication compared to an abscess.
- A diverticulum is an outpouching of the urethra, which can cause symptoms like dysuria, recurrent UTIs, and post-void dribbling, but does not typically pose the same acute infectious risk as an abscess.
*Retention of urine*
- **Urinary retention** is a common and significant symptom of a urethral stricture, as the narrowing blocks the flow of urine.
- While uncomfortable and requiring intervention, acute urinary retention itself is usually manageable with catheterization and does not carry the same degree of tissue destruction and systemic infection risk as a periurethral abscess.
*All of these*
- While all listed options can be complications of an untreated urethral stricture, **periurethral abscess** represents the most serious due to its potential for severe infection, tissue destruction, and more complex management.
- The question asks for the **most serious** complication, which points to the one with the highest morbidity and potential for systemic consequences.
Anorectal Abscess and Fistula Indian Medical PG Question 9: A young male patient presents with complete rectal prolapse and no history of previous surgeries. The surgery of choice is:
- A. Delorme's procedure
- B. Anterior resection
- C. Abdominal rectopexy (Correct Answer)
- D. Goodsall's procedure
Anorectal Abscess and Fistula Explanation: ***Abdominal rectopexy***
- **Abdominal rectopexy** is considered the surgery of choice for **complete rectal prolapse** in young, fit patients due to its superior long-term results in terms of recurrence rates.
- This procedure involves addressing the prolapse via an abdominal approach, often by fixing the rectum to the sacrum, and may include sigmoid resection if there is a redundant colon.
*Delorme's procedure*
- This is a **perineal approach** that involves plication of the prolapsed rectal mucosa and muscle.
- It is generally favored in **elderly** or **frail patients** due to its lower morbidity, but it has a higher recurrence rate compared to abdominal approaches.
*Anterior resection*
- **Anterior resection** is primarily a procedure for removing a diseased segment of the **left colon or rectum**, typically for cancer or diverticular disease.
- While it may be combined with rectopexy if a redundant sigmoid colon is present, it is not the primary or sole treatment for rectal prolapse itself.
*Goodsall's procedure*
- **Goodsall's rule** is a principle used to predict the internal opening of an anal fistula based on the external opening's location, and **Goodsall's procedure** is not a named surgical technique for rectal prolapse.
- This option appears to be a distractor, as there is no specific surgical procedure for rectal prolapse named after Goodsall.
Anorectal Abscess and Fistula Indian Medical PG Question 10: During incision and drainage of ischiorectal abscess, which nerve is most likely to be injured?
- A. Superior rectal nerve
- B. Inferior rectal nerve (Correct Answer)
- C. Superior gluteal nerve
- D. Inferior gluteal nerve
Anorectal Abscess and Fistula Explanation: ***Inferior rectal nerve***
- The **inferior rectal nerve** innervates the **external anal sphincter** and the skin around the anus, making it vulnerable during an incision and drainage of an **ischiorectal abscess** due to its anatomical proximity.
- Injury to this nerve can lead to **fecal incontinence** or altered sensation in the perianal region.
*Superior rectal nerve*
- The **superior rectal nerve** is primarily involved in the innervation of the **rectum** and is not directly located in the area of an **ischiorectal abscess**.
- This nerve supplies the smooth muscle of the rectum and is not anatomically vulnerable during incision and drainage of an abscess in the ischiorectal fossa.
*Superior gluteal nerve*
- The **superior gluteal nerve** supplies the **gluteus medius**, **gluteus minimus**, and **tensor fasciae latae muscles**, which are typically located much more superior and lateral to an **ischiorectal abscess**.
- Damage to this nerve causes a characteristic **Trendelenburg gait**, which is unrelated to perianal surgery.
*Inferior gluteal nerve*
- The **inferior gluteal nerve** innervates the **gluteus maximus muscle**, which is also located more superiorly and laterally relative to the **ischiorectal fossa**.
- Injury to this nerve would primarily affect hip extension and is not a common complication of **ischiorectal abscess** drainage.
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