NEET-PG 2012 Practice Questions

Q: Which of the following pairs of conditions is incorrectly matched?

Erythema chronicum migrans - malignancy. ***Erythema chronicum migrans - malignancy*** - **Erythema chronicum migrans** is the characteristic skin lesion of **Lyme disease**, caused by the bacterium *Borrelia burgdorferi*, transmitted by ticks. - It is not associated with malignancy; rather, its presence indicates a **bacterial infection** requiring antibiotic treatment. *Erythema marginatum - rheumatic fever* - **Erythema marginatum** is a **major diagnostic criterion** for **rheumatic fever**, a post-streptococcal inflammatory disease. - The rash is characterized by non-itchy, pink or red macules with raised, serpiginous borders that spread outwards, often transient. *Erythema gyratum repens - malignancy* - **Erythema gyratum repens** is a rare **paraneoplastic dermatosis** strongly associated with various internal malignancies, most commonly lung cancer. - It presents as a characteristic **wood-grain-like pattern** of concentric, migratory erythematous bands. *Necrotic acral erythema - HCV* - **Necrotic acral erythema** is a skin condition that predominantly affects the hands and feet and has a strong association with **hepatitis C virus (HCV) infection**. - It presents with violaceous plaques that can ulcerate and become necrotic, often in patients with chronic HCV.

Q: In which of the following conditions is the Koebner phenomenon most commonly observed?

Psoriasis. ***Correct: Psoriasis*** - **Psoriasis** is the **most classic and commonly cited example** of the Koebner phenomenon (isomorphic response) - New psoriatic plaques characteristically develop at sites of cutaneous trauma, scratches, or surgical incisions in 25-50% of psoriasis patients - This is a **pathognomonic feature** frequently tested in competitive exams and considered the prototype condition for demonstrating this phenomenon - The mechanism involves inflammatory cascades triggered by trauma in genetically predisposed skin *Incorrect: Lichen planus* - While lichen planus does exhibit the Koebner phenomenon with purplish polygonal papules appearing along scratch lines, it is **less commonly observed** compared to psoriasis - Seen in approximately 10-25% of lichen planus cases - Not considered the primary example when teaching about Koebner phenomenon *Incorrect: Viral warts* - Viral warts can demonstrate **pseudo-Koebner phenomenon** where new warts form along trauma lines due to viral inoculation - This is more accurately described as **autoinoculation** rather than true isomorphic response - Less commonly discussed in the context of classic Koebner phenomenon compared to psoriasis *Incorrect: All of the options* - While all three conditions can show Koebner-like responses, the question asks for "**most commonly observed**" - Psoriasis remains the **gold standard** and most frequently encountered example in clinical practice and medical literature

Q: Itchy purple papule followed by hyperpigmentation on resolution, is seen in?

Lichen planus. ***Correct: Lichen planus*** - This condition presents with characteristic **pruritic (itchy) violaceous (purple) papules** that often develop **post-inflammatory hyperpigmentation** upon resolution. - The classic presentation follows the **"5 P's": Purple, Pruritic, Polygonal, Planar, Papules**. - Lesions commonly affect the **wrists, ankles, lower back, and genitals**, and may also involve the **oral mucosa** (Wickham's striae). - The hyperpigmentation on resolution is due to **melanin incontinence** and dermal melanophages. *Incorrect: Addison's disease* - Characterized by **hyperpigmentation**, but this is typically diffuse, affecting sun-exposed areas, pressure points, and mucous membranes (e.g., gum line), not discrete papules. - The pigmentation is due to increased **ACTH stimulating melanocytes**, without an initial itchy papular stage. *Incorrect: DM (Diabetes Mellitus)* - Diabetes Mellitus can cause various skin manifestations, including **acanthosis nigricans**, necrobiosis lipoidica diabeticorum, and diabetic dermopathy. - These manifestations do not typically present as itchy purple papules followed by hyperpigmentation, but rather as thickened, velvety skin folds or atrophic, pigmented lesions. *Incorrect: Hypothyroidism* - Can lead to **dry, coarse skin**, and occasionally **non-pitting edema** (myxedema). - It does not present with itchy purple papules or lesions that resolve with hyperpigmentation.

Q: Corkscrew esophagus is seen in which of the following conditions ?

Diffuse esophagus spasm. ***Diffuse esophagus spasm*** - **Corkscrew esophagus** is a classic radiographic finding in **diffuse esophageal spasm (DES)**, indicating multiple simultaneous, non-peristaltic contractions. [1] - This condition is characterized by **uncoordinated esophageal contractions** that can lead to chest pain and dysphagia. [1] *Scleroderma* - Scleroderma typically causes **hypomotility** or aperistalsis in the esophagus, especially in the distal two-thirds, rather than a corkscrew appearance. [1] - It results from progressive **fibrosis and atrophy of the smooth muscle**, leading to esophageal dilation and reflux symptoms. [1] *Achalasia cardia* - Achalasia is defined by the **failure of the lower esophageal sphincter (LES) to relax** and loss of peristalsis in the esophageal body, leading to a "bird-beak" appearance on barium swallow. [2] - It features a **dilated esophagus** proximally to the tight LES, not multiple indentations. [2] *Carcinoma esophagus* - Esophageal carcinoma usually presents as a **focal stricture**, mass, or irregular lumen on imaging, often causing dysphagia that is progressive. - It does not typically cause the diffuse, segmental contractions characteristic of a corkscrew esophagus.

Q: Which of the following is a characteristic feature of myasthenia gravis?

Presence of antibodies against acetylcholine receptors. ***Presence of antibodies against acetylcholine receptors*** - **Myasthenia gravis** is an **autoimmune disorder** characterized by the production of **antibodies against acetylcholine receptors** at the neuromuscular junction [1]. - These antibodies block, alter, or destroy the acetylcholine receptors, leading to impaired nerve-to-muscle communication and **muscle weakness** [2]. *Decreased levels of myosin in muscle fibers* - Myosin is a **motor protein** crucial for muscle contraction, and its decreased levels are not a primary feature of myasthenia gravis, but rather other **myopathies** or muscle wasting conditions. - The disease mechanism in myasthenia gravis is primarily at the **neuromuscular junction**, not within the muscle fibers themselves. *Absence of troponin C in muscle fibers* - **Troponin C** is a component of the troponin complex essential for **calcium-mediated muscle contraction**, found inside muscle fibers. - Its absence would lead to severe and widespread muscle dysfunction, unlike the specific and fluctuating weakness seen in **myasthenia gravis**. *Increased transmission at the myoneural junction* - Myasthenia gravis is characterized by **decreased** or **impaired transmission** at the myoneural (neuromuscular) junction due to the destruction or blockade of acetylcholine receptors [2]. - Increased transmission would lead to **muscle hyperactivity** or spasms, which is contrary to the **fatigable weakness** observed in myasthenia gravis.

Q: A 35-year-old woman presents with 4 months of amenorrhea, increased FSH, LH, and decreased estrogen. What is the most likely diagnosis?

Premature ovarian insufficiency. ***Premature ovarian insufficiency (POI)*** - The patient's age (35 years) combined with 4 months of **amenorrhea**, increased **FSH** and **LH**, and decreased **estrogen** is characteristic of premature ovarian insufficiency (also called premature ovarian failure). - The hormonal profile (**hypergonadotropic hypogonadism**) indicates ovarian failure occurring before the age of **40 years**, which defines POI. - POI affects approximately **1% of women under 40** and can present with amenorrhea, infertility, and symptoms of estrogen deficiency. *Menopause* - Menopause is diagnosed after **12 consecutive months of amenorrhea** in a woman, typically occurring around age **51 years** (natural menopause). - While the hormonal profile of elevated FSH/LH and low estrogen is consistent with menopause, the patient's **age of 35 years** and **only 4 months of amenorrhea** do not meet the criteria for natural menopause. *Late menopause* - Late menopause refers to menopause occurring at a later age than average, typically after age **55 years**. - This diagnosis is completely inconsistent with the patient's age of 35 years. *Perimenopause* - Perimenopause is the transitional phase leading up to menopause, characterized by **irregular menstrual cycles** and **fluctuating hormone levels**. - While FSH levels may be elevated at times, perimenopause typically shows **variable hormone levels** rather than the sustained pattern of high FSH/LH with low estrogen seen in this case. - The **sustained amenorrhea** and pronounced hormonal shifts indicate ovarian failure (POI) rather than perimenopausal transition.

Q: 6 year old son of pregnant woman is suffering from chicken pox. Which of the following is given to pregnant woman?

Only immunoglobulin. ***Only immunoglobulin*** - Giving **immunoglobulin** to a pregnant woman exposed to **chickenpox** provides immediate passive immunity, which is crucial as she is at risk of infection from her child. - This is particularly important because chickenpox during pregnancy can lead to severe maternal disease and congenital varicella syndrome in the fetus. *Acyclovir + immunoglobulin* - **Acyclovir** is an antiviral that treats active varicella infection but is not typically given prophylactically in combination with immunoglobulin for exposure unless the woman is already immunocompromised or develops symptoms. - The primary goal for exposed pregnant women is preventing infection through passive immunity, not immediately treating a potential infection. *Vaccination* - **Varicella vaccine** is a live attenuated vaccine and is **contraindicated** during pregnancy due to the theoretical risk of fetal infection. - It is used for pre-conception immunity or post-exposure prophylaxis in non-pregnant individuals if given within a short window, but not for pregnant women. *Acyclovir* - **Acyclovir** is an antiviral medicine used to treat active chickenpox infections, not to prevent infection immediately after exposure. - It would be considered if the pregnant woman develops symptoms of chickenpox, but not as a primary prophylactic measure in this scenario.

Q: Which of the following is a renal-specific nephropathy associated with HIV?

Focal Segmental Glomerulosclerosis (FSGS). ### Focal Segmental Glomerulosclerosis - It is a common renal complication associated with **HIV infection**, characterized by **podocyte injury** and segmental sclerosis [1]. - Often results in **nephrotic syndrome**, presenting with significant **proteinuria** and edema, making it distinct in HIV renal pathology [1]. ### Membranous Glomerulonephritis - Typically presents with **subepithelial immune complex deposits**, leading to a different pathophysiological mechanism. - More commonly associated with other secondary causes, such as **drugs** or **infection**, rather than being specific to HIV. ### Mesangioproliferative Glomerulonephritis - Characterized by **mesangial cell proliferation and immune complex deposition**, often linked with various infections but not specifically with HIV. - Usually shows **hematuria** and mild proteinuria, lacking the severe nephrotic syndrome seen in focal segmental glomerulosclerosis. ### Membranoproliferative Glomerulonephritis - Features **proliferation of mesangial and endothelial cells**, leading to a distinctive pattern on renal biopsy, not specific to HIV. - Typically presents in other contexts such as **chronic infections** or **autoimmune diseases**, rather than predominantly with HIV.

Q: Which of the following diseases is NOT associated with Anti-Neutrophil Cytoplasmic Antibodies (ANCA)?

Henoch schonlein purpura. ***Henoch schonlein purpura*** - **Henoch-Schönlein purpura (HSP)** is not associated with **ANCA**; it primarily involves IgA deposition [1]. - Commonly presents with **purpura**, **abdominal pain**, and **glomerulonephritis**, differentiating it from ANCA-associated vasculitides [1]. *Wegener's granulomatosis* - **Wegener's granulomatosis**, now known as **Granulomatosis with polyangiitis**, is strongly associated with **c-ANCA** and anti-PR3 antibodies. - It typically presents with **respiratory** and **renal symptoms** due to vasculitis [2]. *Microscopic PAN* - **Microscopic polyangiitis (PAN)** is associated with **p-ANCA** and myeloperoxidase (MPO) antibodies. - It leads to **glomerulonephritis** and **pulmonary hemorrhage**, indicating its vasculitic nature. *Churg Strauss syndrome* - **Churg-Strauss syndrome**, or **Eosinophilic Granulomatosis with Polyangiitis**, is associated with **p-ANCA** and perinuclear staining [1]. - Often presents with **asthma**, **eosinophilia**, and systemic vasculitis affecting multiple organs [1].

Q: What is the term for a persistent preoccupation with serious illness despite having no or only mild symptoms?

Illness anxiety disorder. ***Illness anxiety disorder*** - This condition is characterized by a **preoccupation with having or acquiring a serious illness** despite having few or no somatic symptoms. - Individuals with illness anxiety disorder engage in **excessive health-related behaviors** (e.g., repeated checking) or maladaptive avoidance (e.g., avoiding doctor appointments). *Somatic symptom disorder* - Involves **distressing somatic symptoms** that result in significant disruption of daily life, with excessive thoughts or behaviors related to the symptoms. - The focus is on the **symptoms themselves**, rather than the fear of a specific undiagnosed illness. *Conversion disorder* - Features neurological symptoms (e.g., weakness, paralysis, seizures) that are **incompatible with recognized neurological or medical conditions**. - There is a **lack of voluntary control** over the symptoms, and they are not intentionally feigned. *Body dysmorphic disorder* - Characterized by a **preoccupation with perceived flaws** or defects in physical appearance that are not observable or appear slight to others. - This preoccupation leads to **repetitive behaviors** (e.g., mirror checking) or mental acts (e.g., comparing oneself to others).

Question 1

Which of the following pairs of conditions is incorrectly matched?

Accepted Answer

Erythema chronicum migrans - malignancy

Answer

Erythema gyratum repens - malignancy

Answer

Erythema marginatum - rheumatic fever

Answer

Necrotic acral erythema - HCV

Question 2

In which of the following conditions is the Koebner phenomenon most commonly observed?

Accepted Answer

Psoriasis

Answer

Lichen planus

Answer

All of the options

Answer

Viral warts

Question 3

Itchy purple papule followed by hyperpigmentation on resolution, is seen in?

Accepted Answer

Lichen planus

Answer

Addison's disease

Answer

DM

Answer

Hypothyroidism

Question 4

Corkscrew esophagus is seen in which of the following conditions ?

Accepted Answer

Diffuse esophagus spasm

Answer

Scleroderma

Answer

Achalasia cardia

Answer

Carcinoma esophagus

Question 5

Which of the following is a characteristic feature of myasthenia gravis?

Accepted Answer

Presence of antibodies against acetylcholine receptors

Answer

Decreased levels of myosin in muscle fibers

Answer

Absence of troponin C in muscle fibers

Answer

Increased transmission at the myoneural junction

Question 6

A 35-year-old woman presents with 4 months of amenorrhea, increased FSH, LH, and decreased estrogen. What is the most likely diagnosis?

Accepted Answer

Premature ovarian insufficiency

Answer

Menopause

Answer

Late menopause

Answer

Perimenopause

Question 7

6 year old son of pregnant woman is suffering from chicken pox. Which of the following is given to pregnant woman?

Accepted Answer

Only immunoglobulin

Answer

Acyclovir + immunoglobulin

Answer

Vaccination

Answer

Acyclovir

Question 8

Which of the following is a renal-specific nephropathy associated with HIV?

Accepted Answer

Focal Segmental Glomerulosclerosis (FSGS)

Answer

Mesangioproliferative Glomerulonephritis

Answer

Membranous Nephropathy

Answer

Membranoproliferative Glomerulonephritis (MPGN)

Question 9

Which of the following diseases is NOT associated with Anti-Neutrophil Cytoplasmic Antibodies (ANCA)?

Accepted Answer

Henoch schonlein purpura

Answer

Wegener's granulomatosis

Answer

Microscopic PAN

Answer

Churg Strauss syndrome

Question 10

What is the term for a persistent preoccupation with serious illness despite having no or only mild symptoms?

Accepted Answer

Illness anxiety disorder

Answer

Somatic symptom disorder

Answer

Conversion disorder

Answer

Body dysmorphic disorder

NEET-PG 2012

Dermatology

Internal Medicine

Obstetrics and Gynecology

Pathology

Psychiatry