Acne and Related Disorders Practice Questions

Q: An 18-year-old girl presents with predominantly comedonal acne. What is the first-line treatment?

Topical retinoids. **Explanation:** The primary goal in treating acne is to target the specific pathogenic mechanism involved. In this case, the patient presents with **predominantly comedonal acne** (non-inflammatory lesions). **1. Why Topical Retinoids are correct:** Topical retinoids (e.g., Adapalene, Tretinoin) are the **first-line treatment** for comedonal acne because they are potent **comedolytic agents**. They work by normalizing follicular keratinization, which prevents the formation of the microcomedo (the precursor to all acne lesions). They also possess mild anti-inflammatory properties, making them the foundation of maintenance therapy. **2. Why other options are incorrect:** * **Systemic retinoids (Isotretinoin):** These are reserved for severe, nodulocystic, or scarring acne, or cases refractory to conventional therapy. They are too aggressive for simple comedonal acne. * **Systemic antibiotics:** These are indicated for moderate-to-severe *inflammatory* acne (papules/pustules) to target *C. acnes* colonization. They have no significant comedolytic activity. * **Topical steroids:** These are **contraindicated** in acne. In fact, prolonged use of topical steroids can induce "steroid-induced acne," characterized by monomorphic papulopustular eruptions. **Clinical Pearls for NEET-PG:** * **Adapalene** is often preferred over Tretinoin due to better photostability and less skin irritation. * **First-line for Mild Inflammatory Acne:** Topical Retinoid + Topical Antimicrobial (e.g., Benzoyl Peroxide or Clindamycin). * **Side Effects:** Topical retinoids commonly cause "retinoid dermatitis" (dryness, erythema, and scaling). Patients should be advised to apply them at night and use sunscreen.

Q: Which of the following drugs should not be used in the management of Rosacea?

Corticosteroids. **Explanation:** **Corticosteroids (Option C)** are contraindicated in the management of Rosacea because they can lead to a condition known as **Steroid-induced Rosacea**. While topical steroids may provide temporary symptomatic relief due to their anti-inflammatory properties, their prolonged use causes rebound vasodilation, skin atrophy, and the development of telangiectasia. Most importantly, they trigger the eruption of inflammatory papules and pustules, severely worsening the underlying disease. **Analysis of Incorrect Options:** * **Isotretinoin (Option A):** Low-dose oral isotretinoin is an effective second-line treatment for refractory or phymatous rosacea. It works by reducing sebaceous gland size and downregulating inflammatory pathways. * **Metronidazole (Option B):** Topical metronidazole (0.75% or 1%) is the **gold standard** first-line topical treatment for papulopustular rosacea due to its potent anti-inflammatory and antioxidant effects. * **Benzoyl peroxide (Option D):** Though potentially irritating, it is used (often in combination with clindamycin or encapsulated formulations) for its antimicrobial properties in treating the inflammatory lesions of rosacea. **High-Yield Clinical Pearls for NEET-PG:** * **First-line Topical:** Metronidazole or Azelaic acid. * **First-line Systemic:** Oral Tetracyclines (Doxycycline is preferred at sub-antimicrobial doses, e.g., 40mg). * **Erythematotelangiectatic Rosacea:** Best treated with topical Brimonidine (alpha-2 agonist) for vasoconstriction. * **Phymatous Rosacea:** Characterized by sebaceous hyperplasia (e.g., Rhinophyma); managed with Isotretinoin or surgical CO2 laser resurfacing. * **Key Trigger:** Demodex folliculorum (mite) is often implicated in the pathogenesis.

Q: Hypertrophy of the sebaceous glands in the nasal skin is called?

Rhinophyma. **Explanation:** **Rhinophyma** is the correct answer. It represents the end-stage of **Phymatous Rosacea**, characterized by the hypertrophy of sebaceous glands, connective tissue hyperplasia, and vascular proliferation in the nasal skin. This results in a bulbous, irregular, and "pitted" appearance of the nose, often described as a "strawberry nose." While Rosacea is more common in women, Rhinophyma occurs almost exclusively in men over the age of 40. **Analysis of Incorrect Options:** * **Rhinosporidiosis:** A chronic granulomatous infection caused by *Rhinosporidium seeberi* (a Mesomycetozoea). It typically presents as friable, leafy, or strawberry-like vascular polyps on the nasal mucosa, not as sebaceous hypertrophy. * **Rhinolith:** A "nose stone" formed by the deposition of mineral salts (calcium and magnesium) around a foreign body nidus within the nasal cavity. * **Rhinorrhoea:** A clinical symptom referring to the free discharge of thin nasal mucus (commonly known as a "runny nose"). **High-Yield Clinical Pearls for NEET-PG:** * **Rosacea Stages:** It progresses through Erythematotelangiectatic, Papulopustular, Phymatous, and Ocular stages. * **Triggers:** Alcohol, spicy foods, sunlight, and hot beverages can exacerbate Rosacea (flushing). * **Treatment:** Early stages are managed with topical Metronidazole or Azelaic acid. Rhinophyma (the phymatous stage) usually requires surgical correction, such as CO2 laser resurfacing or electrosurgery, as medical therapy is ineffective for established hypertrophy. * **Demodex folliculorum:** This mite is often implicated in the pathogenesis of Rosacea.

Q: What is the most common site for Necrobiosis Lipoidica Diabeticorum?

Leg. **Explanation:** **Necrobiosis Lipoidica (NL)**, formerly known as Necrobiosis Lipoidica Diabeticorum, is a chronic granulomatous skin disorder characterized by collagen degeneration and granuloma formation. **Why the Leg is Correct:** The **pretibial area (shins)** is the most common site, involved in approximately **85% of cases**. The lesions typically present as well-circumscribed, firm, depressed, waxy, yellow-brown plaques with prominent telangiectasia and an "apple-jelly" hue. The skin in this area is prone to microvascular changes and minor trauma, which are thought to contribute to the pathogenesis. **Why Other Options are Incorrect:** * **Face & Neck:** While NL can occur in extra-pretibial sites (15% of cases), involvement of the face and neck is extremely rare. These areas are more common for other granulomatous conditions like *Granuloma Annulare*. * **Ankle:** Although lesions can extend toward the ankle, the primary and most frequent site of onset remains the anterior surface of the lower leg (shins). **High-Yield Clinical Pearls for NEET-PG:** * **Association with Diabetes:** Only about 0.3% of diabetic patients develop NL, but **65% of patients with NL have diabetes**. It is more common in Type 1 DM and in females. * **Pathology:** Look for "tiered" or "sandwich" granulomas in the dermis involving collagen necrobiosis. * **Koebner Phenomenon:** NL can exhibit the Koebner phenomenon (lesions appearing at sites of trauma). * **Complication:** The most serious complication is the development of **Squamous Cell Carcinoma** within chronic, ulcerated NL lesions. * **Treatment:** First-line therapy includes potent topical or intralesional corticosteroids.

Q: A patient presented with the following symptoms. What is the etiopathogenesis of the disease process?

Sebaceous gland hypertrophy. ***Sebaceous gland hypertrophy*** - **Rhinophyma** is a subtype of **rosacea** characterized by progressive **sebaceous gland hypertrophy** in the nasal region, leading to the characteristic bulbous appearance. - Results in a **lobulated, reddish nasal appearance** with prominent pores and thickened skin, commonly called "**potato nose**." *Septal deviation of the nose* - This is a **structural abnormality** of the nasal septum that causes **nasal obstruction** and breathing difficulties. - Does not cause the characteristic **bulbous, lobulated external nasal appearance** seen in rhinophyma. *Sweat gland hypertrophy* - **Eccrine** or **apocrine sweat gland** enlargement typically affects areas like **axillae** and **groin**, not the nose. - Would not produce the **reddish, bulbous nasal deformity** with prominent pores characteristic of rhinophyma. *Mucous gland hypertrophy* - **Mucous glands** are primarily located in the **nasal cavity** and **paranasal sinuses**, not in the external nasal skin. - Hypertrophy would cause **nasal congestion** and **rhinorrhea**, not the external **lobulated nasal appearance**.

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.

Question 1

A 72-year-old fair-skinned farmer presents with a slowly enlarging, non-healing lesion on his nose that occasionally bleeds. He reports decades of outdoor sun exposure. The lesion has been present for approximately 18 months. On examination, a pearly, translucent nodule with rolled telangiectatic borders and central ulceration is noted on the nasal ala — a high-risk H-zone location. Which of the following is the most appropriate primary treatment for this lesion?

Accepted Answer

A. Mohs micrographic surgery with margin-controlled excision

Answer

B. Topical imiquimod 5% cream applied five times weekly for six weeks

Answer

C. Wide local excision with 1 cm margins followed by sentinel lymph node biopsy

Answer

D. Cryotherapy with double freeze-thaw cycle as definitive monotherapy

Question 2

A 52-year-old fair-skinned man presents with a 1.2 cm pigmented lesion on his back that has changed in colour and border over the past 6 months. His GP referred him after noting asymmetry on clinical examination. The dermoscopy image is shown in (Image 1). Which of the following dermoscopic structures most specifically supports a diagnosis of malignancy in this lesion?

Accepted Answer

A. Blue-white veil overlying an area of raised, irregular pigmentation with peripheral pseudopods

Answer

B. Regular pigment network fading gradually at the periphery with central hypopigmentation

Answer

C. Multiple white milia-like cysts distributed across a cerebriform surface

Answer

D. Well-defined leaf-like brown structures associated with large arborising telangiectasias

Question 3

An 18-year-old girl presents with predominantly comedonal acne. What is the first-line treatment?

Accepted Answer

Topical retinoids

Answer

Systemic retinoids

Answer

Systemic antibiotics

Answer

Topical steroids

Question 4

Which of the following drugs should not be used in the management of Rosacea?

Accepted Answer

Corticosteroids

Answer

Isotretinoin

Answer

Metronidazole

Answer

Benzoyl peroxide

Question 5

Hypertrophy of the sebaceous glands in the nasal skin is called?

Accepted Answer

Rhinophyma

Answer

Rhinodporidiosis

Answer

Rhinolith

Answer

Rhinorrhoea

Question 6

Which of the following is the main etiological factor for Hidradenitis suppurativa?

Accepted Answer

Smoking

Answer

Diabetes

Answer

Steroid use

Answer

Obesity

Question 7

What is the most common site for Necrobiosis Lipoidica Diabeticorum?

Accepted Answer

Leg

Answer

Face

Answer

Neck

Answer

Ankle

Question 8

A patient presented with the following symptoms. What is the etiopathogenesis of the disease process?

Accepted Answer

Sebaceous gland hypertrophy

Answer

Septal deviation of the nose

Answer

Sweat gland hypertrophy

Answer

Mucous gland hypertrophy

Question 9

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 10

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

Acne and Related Disorders — MCQs

Acne and Related Disorders — MCQs

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