Acne and Related Disorders Practice Questions

Q: The condition seen in the illustration is:

Glandular form of acne rosacea. ***Glandular form of acne rosacea*** - This represents **rhinophyma**, the **phymatous/glandular form** of acne rosacea characterized by **sebaceous hyperplasia** and tissue overgrowth on the nose. - Typically presents as a **bulbous, enlarged nose** with prominent pores and **erythematous, thickened skin** in middle-aged to older adults. *A form of acne vulgaris* - **Acne vulgaris** primarily affects adolescents and young adults with **comedones, papules, and pustules** on face, chest, and back. - Unlike rhinophyma, acne vulgaris does not cause **tissue hypertrophy** or the characteristic **bulbous nasal deformity**. *Affects the scalp* - **Rhinophyma** specifically affects the **nasal area** and does not involve the scalp region. - **Scalp involvement** would suggest other conditions like **seborrheic dermatitis** or **folliculitis**, not rosacea variants. *A form of dermatofibroma* - **Dermatofibroma** is a benign **fibrous nodule** that typically appears as a **firm, brown papule** on extremities. - It lacks the **vascular component**, **sebaceous hyperplasia**, and **nasal location** characteristic of rhinophyma.

Q: A 50-year-old female presents with lesions on her cheek, chin, and forehead. On examination, the skin is erythematous with dilated blood vessels, nodules, and pustules, but no comedones. What is the most likely diagnosis?

Rosacea. ### Explanation The correct diagnosis is **Rosacea**. This clinical presentation highlights the classic triad of rosacea: **erythema, telangiectasia (dilated blood vessels), and inflammatory lesions (papules/pustules)** involving the central face (cheeks, chin, forehead). The most critical diagnostic feature in this case is the **absence of comedones**. Rosacea is often called "adult acne," but unlike Acne Vulgaris, it is not a disorder of the pilosebaceous follicle involving hyperkeratinization; therefore, comedones (blackheads/whiteheads) are never present. The presence of nodules and pustules in a middle-aged female further supports the diagnosis of **Papulopustular Rosacea**. **Why other options are incorrect:** * **Folliculitis:** Usually presents as monomorphic pustules centered around hair follicles, often triggered by infection or friction, and lacks the background of telangiectasia and persistent facial erythema. * **Mild Acne Vulgaris:** While it presents with papules and pustules, it is characterized by the presence of **comedones** and typically occurs in a younger age group. * **Acne Conglobata:** This is a severe form of acne characterized by interconnecting abscesses, cysts, and significant scarring. It also features prominent comedones (often polyporous). **High-Yield Clinical Pearls for NEET-PG:** * **Triggers:** Rosacea is exacerbated by sunlight, spicy food, alcohol, and hot beverages. * **Demographics:** Most common in females aged 30–50 years. * **Phymatous changes:** Chronic rosacea can lead to **Rhinophyma** (bulbous nose due to sebaceous gland hyperplasia), which is more common in males. * **Ocular Rosacea:** Up to 50% of patients have eye involvement (blepharitis, conjunctivitis). * **Treatment:** Topical **Metronidazole** is the first-line treatment; systemic Tetracyclines (Doxycycline) are used for inflammatory lesions.

Q: Which of the following is NOT a causative factor for acne?

Dietary factors. **Explanation:** Acne vulgaris is a chronic inflammatory disease of the pilosebaceous unit. The pathogenesis involves four primary factors: follicular hyperkeratinization, sebum production (androgen-mediated), colonization by *Cutibacterium acnes*, and inflammation. **Why "Dietary Factors" is the correct answer:** While historically debated, current medical consensus and standard textbooks (like Fitzpatrick) emphasize that **dietary factors** (such as chocolate, oily foods, or sweets) are not primary causative factors in the pathogenesis of acne. Although high-glycemic-index diets or dairy may exacerbate pre-existing acne in some individuals, they do not trigger the underlying pathophysiological process. **Analysis of other options:** * **Androgens (A):** These are crucial. Androgens (specifically DHT) stimulate sebaceous glands to increase sebum production, which is a prerequisite for acne development. * **Keratin (C):** Abnormal follicular **keratinization** leads to the formation of a "keratin plug" (microcomedo), which obstructs the pilosebaceous duct. * **Cell Nucleus (D):** This refers to the nuclear receptors (like Retinoic Acid Receptors or PPARs) involved in the differentiation of sebocytes and keratinocytes. Furthermore, the inflammatory cascade in acne involves nuclear transcription factors like **NF-κB**. **High-Yield Clinical Pearls for NEET-PG:** * **Primary lesion:** The **Microcomedo** is the earliest pathological lesion. * **Bacteria:** *Cutibacterium acnes* (formerly *Propionibacterium*) is a Gram-positive anaerobic rod. * **Drug of Choice:** Oral **Isotretinoin** is the only drug that acts on all four pathogenic mechanisms. * **Hormonal markers:** In females with recalcitrant acne, check for PCOS (increased LH/FSH ratio and DHEAS).

Q: Oral retinoid is indicated in the treatment of which condition?

Acne vulgaris. **Explanation:** **Correct Option: A. Acne Vulgaris** Oral retinoids (specifically **Isotretinoin**) are the "gold standard" for severe, recalcitrant, or nodulocystic acne. Isotretinoin is unique because it is the only drug that targets all four pathogenic mechanisms of acne: 1. **Sebosuppression:** Reduces sebum production by inducing apoptosis of sebocytes. 2. **Comedolysis:** Normalizes follicular keratinization. 3. **Antibacterial:** Indirectly reduces *Cutibacterium acnes* by removing its food source (sebum). 4. **Anti-inflammatory:** Inhibits chemotaxis and inflammation. **Why other options are incorrect:** * **B. Pemphigus Vulgaris:** This is an autoimmune bullous disorder caused by antibodies against desmogleins. The mainstay of treatment is **systemic corticosteroids** and immunosuppressants (e.g., Azathioprine, Rituximab). * **C. Lupus Vulgaris:** This is a chronic form of cutaneous **Tuberculosis**. Treatment requires standard **Anti-Tubercular Therapy (ATT)** (Rifampicin, Isoniazid, etc.). * **D. Erythema Multiforme:** This is a hypersensitivity reaction (often triggered by HSV). Management involves treating the underlying cause and using supportive care or steroids; retinoids have no role here. **High-Yield Clinical Pearls for NEET-PG:** * **Teratogenicity:** Isotretinoin is highly teratogenic (Category X). Pregnancy must be ruled out, and "dual contraception" is mandatory (PPP - Pregnancy Prevention Programme). * **Monitoring:** Baseline and periodic checks of **Lipid profile** (risk of hypertriglyceridemia) and **Liver Function Tests (LFTs)** are essential. * **Side Effects:** The most common side effect is **Cheilitis** (dry lips). It is also associated with pseudotumor cerebri if taken with tetracyclines. * **Other indications for Retinoids:** Psoriasis (Acitretin), Ichthyosis, and Darier’s disease.

Q: A 17-year-old male is to be started on oral isotretinoin. What parameter should be measured before instituting therapy?

Liver function test and lipid profile. **Explanation:** Oral isotretinoin is a systemic retinoid used for severe, nodulocystic, or recalcitrant acne. Because it is metabolized by the liver and significantly impacts lipid metabolism, baseline and periodic monitoring of specific laboratory parameters is mandatory. **Why Option B is Correct:** 1. **Liver Function Tests (LFTs):** Isotretinoin can cause a transient, dose-dependent increase in transaminases (ALT/AST). While usually mild, monitoring is essential to prevent hepatotoxicity. 2. **Lipid Profile:** Isotretinoin frequently causes **hypertriglyceridemia** (most common) and increased LDL levels. Severe hypertriglyceridemia (>800 mg/dL) poses a risk for acute pancreatitis; hence, a baseline lipid profile is critical. **Why Other Options are Incorrect:** * **Serum Electrolytes (Options A & C):** Isotretinoin does not affect renal function or electrolyte balance (sodium, potassium, etc.). * **Platelet Count (Option D):** While rare hematological changes (like mild leukopenia) can occur, they are not standard baseline requirements compared to LFTs and lipids. **High-Yield Clinical Pearls for NEET-PG:** * **Teratogenicity:** The most serious side effect. Female patients must follow the **iPLEDGE** program (or similar protocols), requiring two negative pregnancy tests before starting and two forms of contraception. * **Most Common Side Effect:** Cheilitis (dryness of lips). * **Musculoskeletal:** May cause myalgia and increased Creatine Phosphokinase (CPK) levels, especially in patients performing vigorous exercise. * **Psychiatric:** Though controversial, it is associated with mood swings and depression in some patients. * **Monitoring Frequency:** Usually checked at baseline, at 4 weeks, and then periodically if values are abnormal.

Q: A teenage girl presented in OPD with moderate acne and a history of irregular menses. What treatment would you suggest?

Cyproterone Acetate. ### Explanation **Correct Answer: D. Cyproterone Acetate** The clinical presentation of **moderate acne** associated with **irregular menses** in a teenage girl strongly suggests an underlying hormonal imbalance, most likely **Polycystic Ovary Syndrome (PCOS)**. In such cases, the acne is driven by hyperandrogenism. **Cyproterone acetate** is a potent anti-androgen that works by blocking androgen receptors and inhibiting 5-alpha reductase. When combined with ethinyl estradiol (as an oral contraceptive pill), it regulates the menstrual cycle and effectively treats hormonal acne by reducing sebum production. **Analysis of Incorrect Options:** * **A. Oral Isotretinoin:** Reserved for severe, nodulocystic, or scarring acne. While effective, it does not address the underlying hormonal trigger (irregular menses) and requires strict contraception due to teratogenicity. * **B. Oral Acitretin:** This is a second-generation retinoid used primarily for **psoriasis**. It is contraindicated in women of childbearing age due to its extremely long half-life and high teratogenic potential. * **C. Oral Minocycline:** An antibiotic used for inflammatory acne. While it helps reduce *C. acnes* colonization, it does not correct the hormonal dysfunction causing the irregular cycles. **Clinical Pearls for NEET-PG:** * **First-line for Hormonal Acne:** Combined Oral Contraceptive Pills (COCPs) or Spironolactone. * **SAHA Syndrome:** Consider this in females with **S**eborrhea, **A**cne, **H**irsutism, and **A**lopecia. * **Investigation of Choice:** If PCOS is suspected, order a USG (Pelvis/Abdomen) and check the LH:FSH ratio (typically >2:1 or 3:1). * **Key Side Effect:** Cyproterone acetate can cause weight gain, breast tenderness, and mood swings.

Q: Acne vulgaris primarily involves which structure?

Sebaceous glands. **Explanation:** Acne vulgaris is a chronic inflammatory disease of the **pilosebaceous unit**. The primary structure involved is the **sebaceous gland**, which is responsible for the production of sebum. **Why Sebaceous Glands are Correct:** The pathogenesis of acne involves four key factors: 1. **Hyperseborrhea:** Excessive sebum production (stimulated by androgens). 2. **Follicular hyperkeratinization:** Plugging of the follicle (comedone formation). 3. **Colonization by *Cutibacterium acnes*:** An anaerobe that thrives in sebum. 4. **Inflammation:** Triggered by the release of free fatty acids and cytokines. Since sebum is the substrate for *C. acnes* and the source of the inflammatory cascade, the sebaceous gland is the central anatomical structure involved. **Why other options are incorrect:** * **Sweat glands:** These include eccrine and apocrine glands. Eccrine glands are involved in thermoregulation, while apocrine glands are involved in conditions like *Hidradenitis suppurativa*, not acne. * **Hair follicles:** While the follicle is part of the "pilosebaceous unit," the primary pathology originates from the gland's activity and the blockage of the duct. In acne, the hair itself is usually rudimentary (vellus hair). * **Ceruminous glands:** These are modified apocrine glands located in the external auditory canal that produce earwax. **High-Yield Clinical Pearls for NEET-PG:** * **Target Structure:** Pilosebaceous unit (specifically on the face, back, and chest where sebaceous glands are largest). * **First visible lesion:** Microcomedone. * **Hallmark lesion:** Comedones (Open = Blackheads; Closed = Whiteheads). * **Drug of Choice (Severe/Nodulocystic):** Oral Isotretinoin (the only drug that targets all four pathogenic factors). * **Common Association:** Polycystic Ovarian Syndrome (PCOS) in females with recalcitrant acne.

Question 1

An 18-year-old female presents with a complaint of recurrent acne on her face and neck. Which of the following is the preferred topical drug for treatment?

Accepted Answer

Minocycline

Answer

Oxytetracycline

Answer

Demeclocycline

Answer

Doxycycline

Question 2

The condition seen in the illustration is:

Accepted Answer

Glandular form of acne rosacea

Answer

A form of acne vulgaris

Answer

Affects the scalp

Answer

A form of dermatofibroma

Question 3

A patient presented with multiple nodulocystic lesions on the face. Which is the drug of choice for this condition?

Accepted Answer

Retinoids

Answer

Antibiotics

Answer

Steroids

Answer

UV light

Question 4

A 50-year-old female presents with lesions on her cheek, chin, and forehead. On examination, the skin is erythematous with dilated blood vessels, nodules, and pustules, but no comedones. What is the most likely diagnosis?

Accepted Answer

Rosacea

Answer

Folliculitis

Answer

Mild acne vulgaris

Answer

Acne conglobata

Question 5

A young person presents with comedones and papulo-pustular acne affecting the face, trunk, and back. What is the recommended management approach for this patient?

Accepted Answer

Oral doxycycline plus topical retinoic acid

Answer

Topical retinoic acid

Answer

Topical clindamycin

Answer

Oral retinoic acid

Question 6

Which of the following is NOT a causative factor for acne?

Accepted Answer

Dietary factors

Answer

Androgen

Answer

Keratin

Answer

Cell nucleus

Question 7

Oral retinoid is indicated in the treatment of which condition?

Accepted Answer

Acne vulgaris

Answer

Pemphigus vulgaris

Answer

Lupus vulgaris

Answer

Erythema multiforme

Question 8

A 17-year-old male is to be started on oral isotretinoin. What parameter should be measured before instituting therapy?

Accepted Answer

Liver function test and lipid profile

Answer

Liver function test and serum electrolytes

Answer

Serum electrolytes and lipid profile

Answer

Platelet count

Question 9

A teenage girl presented in OPD with moderate acne and a history of irregular menses. What treatment would you suggest?

Accepted Answer

Cyproterone Acetate

Answer

Oral Isotretinoin

Answer

Oral Acitretin

Answer

Oral Minocycline

Question 10

Acne vulgaris primarily involves which structure?

Accepted Answer

Sebaceous glands

Answer

Sweat glands

Answer

Hair follicles

Answer

Ceruminous glands

Acne and Related Disorders — MCQs

Acne and Related Disorders — MCQs

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