Acne and Related Disorders Practice Questions

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: 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.

Q: A 35-year-old woman presents with a history of erythematous papulopustular lesions on the face, with diffuse redness on her cheeks. What is the most likely diagnosis?

Rosacea. **Explanation:** The clinical presentation of erythematous papulopustular lesions associated with diffuse facial redness (erythema) in a 35-year-old woman is classic for **Rosacea**. **1. Why Rosacea is Correct:** Rosacea is a chronic inflammatory dermatosis primarily affecting the "flush areas" of the face (cheeks, nose, chin, and forehead). The key differentiating feature from acne is the **absence of comedones** and the presence of **persistent erythema and telangiectasia**. It typically affects middle-aged adults (30–50 years), particularly women. The papulopustular subtype (Subtype 2) mimics acne but occurs on a background of chronic redness. **2. Why Other Options are Incorrect:** * **Acne Vulgaris:** While it presents with papules and pustules, the hallmark lesion is the **comedone** (blackhead/whitehead). It typically begins in puberty and lacks the diffuse, persistent background erythema seen in rosacea. * **Atopic Dermatitis:** This presents with intense pruritus, xerosis (dryness), and eczematous plaques, usually on flexural surfaces. Facial involvement is more common in infants than in 35-year-old adults. * **Seborrheic Dermatitis:** Characterized by erythematous plaques with **greasy, yellowish scales** in seborrheic areas (nasolabial folds, eyebrows, scalp). It does not typically present with pustules. **High-Yield Clinical Pearls for NEET-PG:** * **Triggers:** Spicy food, alcohol, sunlight, and hot beverages (vasodilation). * **Ocular Rosacea:** Up to 50% of patients have eye involvement (blepharitis, conjunctivitis). * **Rhinophyma:** Hypertrophy of sebaceous glands leading to a bulbous nose (more common in men). * **Treatment:** Topical **Metronidazole** is the drug of choice for mild cases; oral Doxycycline is used for systemic therapy. Avoid topical steroids as they can worsen the condition (Steroid-induced Rosacea).

Q: A 58-year-old man complains of an enlarged, pitted nose, and a facial rash that flushes in response to drinking hot liquids or alcohol. The rash is on both cheeks and is red and flushed in appearance, with some telangiectasias and small papules. Which of the following is the most likely diagnosis?

rosacea. **Explanation:** The clinical presentation of facial flushing triggered by **hot liquids and alcohol**, combined with **telangiectasias, papules**, and an **enlarged, pitted nose (rhinophyma)**, is classic for **Rosacea**. Rosacea is a chronic inflammatory dermatosis primarily affecting the "flush areas" of the face. The patient exhibits features of two subtypes: 1. **Erythematotelangiectatic Rosacea:** Characterized by flushing and persistent central facial erythema with telangiectasias. 2. **Phymatous Rosacea:** Characterized by skin thickening and irregular surface nodularities, most commonly affecting the nose (rhinophyma). This subtype is predominantly seen in men. **Why other options are incorrect:** * **Acne Vulgaris:** While it presents with papules, it is characterized by the presence of **comedones** (absent here) and typically affects a younger age group. It does not cause flushing or rhinophyma. * **Pemphigus:** An autoimmune blistering disorder. It presents with flaccid bullae and erosions, not flushing or phymatous changes. * **Psoriasis:** Presents as well-demarcated erythematous plaques with silvery-white scales, typically on extensor surfaces. Facial involvement is less common and does not involve flushing triggers. **NEET-PG High-Yield Pearls:** * **Triggers:** Sunlight, spicy food, alcohol, and emotional stress. * **Ocular Rosacea:** Up to 50% of patients have eye involvement (blepharitis, conjunctivitis). * **Management:** * General: Sun protection and trigger avoidance. * Topical: **Metronidazole** (drug of choice), Ivermectin, or Azelaic acid. * Systemic: Oral Doxycycline (sub-antimicrobial doses). * Rhinophyma: Treated with CO2 laser or surgical debulking.

Q: Rhinophyma is characterized by which of the following?

Sebaceous gland hypertrophy. **Explanation:** **Rhinophyma** is a severe, late-stage manifestation of **Phymatous Rosacea**. It is characterized by a bulbous, irregular enlargement of the nose, primarily due to the **hypertrophy and hyperplasia of sebaceous glands**, along with associated fibrosis and connective tissue proliferation. 1. **Why Option D is correct:** In the phymatous stage of rosacea, chronic inflammation leads to the overgrowth of the pilosebaceous units. This results in thickened skin, enlarged follicular orifices, and a "potato-like" appearance of the nose. Histologically, there is a marked increase in the size and number of sebaceous glands. 2. **Why other options are incorrect:** * **Option A:** Septal deviation is a structural/anatomical deformity of the nasal cartilage and bone, unrelated to the cutaneous pathology of rosacea. * **Option B & C:** While there is soft tissue hypertrophy, it specifically involves the sebaceous glands and dermal collagen, not the sweat (eccrine/apocrine) or mucous glands. **High-Yield Clinical Pearls for NEET-PG:** * **Demographics:** Unlike classic rosacea (more common in females), Rhinophyma is significantly more common in **males** (ratio ~20:1). * **Common Sites:** While the nose is most common, other "phyma" types include **Gnathophyma** (chin), **Metophyma** (forehead), and **Otophyma** (ears). * **Clinical Sign:** The "Squeezing Sign"—pressure on the rhinophyma may express a foul-smelling, pasty sebum (seborrhea). * **Treatment:** Medical therapy (Isotretinoin) is effective in early stages, but established Rhinophyma usually requires **surgical intervention** (CO2 laser resurfacing or electrosurgery) to debulk the tissue.

Q: Treatment of acne vulgaris may include all except?

Androgens. **Explanation:** The pathogenesis of **Acne Vulgaris** is primarily driven by four factors: follicular hyperkeratinization, *Cutibacterium acnes* colonization, inflammation, and **excess sebum production**. Sebum production is directly stimulated by **Androgens** (specifically Dihydrotestosterone acting on sebaceous glands). Therefore, administering androgens would exacerbate acne rather than treat it, making it the correct "except" choice. **Analysis of Options:** * **Androgens (Correct Answer):** These increase the size and activity of sebaceous glands. Conditions with high androgen levels (e.g., PCOS, adrenal tumors) are classic causes of refractory acne. * **Oestrogens:** These are used in female patients (often via Oral Contraceptive Pills) to suppress ovarian androgen production and increase Sex Hormone Binding Globulin (SHBG), which lowers free testosterone, thereby improving acne. * **UV Light:** Phototherapy (Blue/Red light) has an antibacterial effect on *C. acnes* and anti-inflammatory properties. While not a first-line treatment, it is a recognized adjuvant modality. * **Cryotherapy:** Slush cryotherapy (using CO2 or Liquid Nitrogen) is an older but recognized physical therapy used to induce superficial peeling and reduce inflammation in nodulocystic acne. **NEET-PG High-Yield Pearls:** * **First-line for mild acne:** Topical retinoids + Benzoyl Peroxide. * **Drug of choice for severe/nodulocystic acne:** Oral Isotretinoin (Side effect: Teratogenicity—requires contraception). * **Hormonal therapy:** Indicated in females with hyperandrogenism (PCOS) or cyclical flares; includes Spironolactone (anti-androgen) and OCPs. * **Dietary link:** High glycemic index foods and dairy are associated with acne flares.

Q: A female presented with erythematous lesions on the face with intolerance to spicy food. What is the most likely diagnosis?

Acne rosacea. **Explanation:** The clinical presentation of erythematous facial lesions triggered by **spicy food** is a classic hallmark of **Acne Rosacea**. Unlike Acne Vulgaris, Rosacea is a chronic inflammatory condition characterized by facial flushing, persistent erythema, telangiectasia, and inflammatory papules/pustules. The underlying pathophysiology involves neurovascular dysregulation and an exaggerated innate immune response. Common triggers include spicy foods, hot beverages, alcohol, and sunlight, all of which induce vasodilation. **Analysis of Options:** * **SLE (Systemic Lupus Erythematosus):** While SLE presents with a "malar rash," it typically spares the nasolabial folds and is not specifically triggered by spicy food. It is often associated with systemic symptoms like joint pain and photosensitivity. * **Chloasma (Melasma):** This presents as hyperpigmented (brownish) macules and patches, usually due to hormonal changes or UV exposure. It is not an erythematous (red) condition and lacks the vascular triggers seen here. * **Lichen Planus Pigmentosus (LPP):** This is a variant of Lichen Planus characterized by grey-brown to dark-brown pigmentation in sun-exposed or intertriginous areas. It does not present with flushing or spicy food intolerance. **High-Yield NEET-PG Pearls:** * **Demographics:** Most common in females aged 30–50 years (though rhinophyma is more common in males). * **Key Feature:** Absence of **comedones** (this distinguishes Rosacea from Acne Vulgaris). * **Ocular Rosacea:** Up to 50% of patients have eye involvement (blepharitis, conjunctivitis). * **Treatment:** Topical **Metronidazole** is the first-line agent. For systemic treatment, oral Doxycycline (sub-antimicrobial doses) is used.

Question 1

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 2

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 3

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 4

Acne vulgaris primarily involves which structure?

Accepted Answer

Sebaceous glands

Answer

Sweat glands

Answer

Hair follicles

Answer

Ceruminous glands

Question 5

A 35-year-old woman presents with a history of erythematous papulopustular lesions on the face, with diffuse redness on her cheeks. What is the most likely diagnosis?

Accepted Answer

Rosacea

Answer

Acne vulgaris

Answer

Atopic dermatitis

Answer

Seborrheic dermatitis

Question 6

A 58-year-old man complains of an enlarged, pitted nose, and a facial rash that flushes in response to drinking hot liquids or alcohol. The rash is on both cheeks and is red and flushed in appearance, with some telangiectasias and small papules. Which of the following is the most likely diagnosis?

Accepted Answer

rosacea

Answer

acne vulgaris

Answer

pemphigus

Answer

psoriasis

Question 7

Rhinophyma is characterized by which of the following?

Accepted Answer

Sebaceous gland hypertrophy

Answer

Septal deviation of the nose

Answer

Sweat gland hypertrophy

Answer

Mucous gland hypertrophy

Question 8

Rhinophyma is a complication of which of the following?

Accepted Answer

Glandular form of acne rosacea

Answer

Form of acne vulgaris

Answer

Affects the scalp

Answer

A form of dermatofibroma

Question 9

Treatment of acne vulgaris may include all except?

Accepted Answer

Androgens

Answer

Cryotherapy

Answer

Oestrogens

Answer

UV light

Question 10

A female presented with erythematous lesions on the face with intolerance to spicy food. What is the most likely diagnosis?

Accepted Answer

Acne rosacea

Answer

Systemic Lupus Erythematosus (SLE)

Answer

Chloasma

Answer

Lichen Planus Pigmentosus (LPP)

Acne and Related Disorders — MCQs

Acne and Related Disorders — MCQs

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