Acne and Related Disorders — MCQs

Acne and Related Disorders Indian Medical PG Practice Questions and MCQs

Question 81: A patient presented with oily skin and acne formation primarily on the face. Multiple enlarged glands were noted on examination. What is the etiopathogenesis of the disease process?

A. Septal deviation of nose
B. Mucous gland hypertrophy
C. Sweat gland hypertrophy
D. Sebaceous gland hypertrophy (Correct Answer)

Explanation: ***Sebaceous gland hypertrophy*** - **Oily skin (seborrhea)** and **acne formation** are directly linked to increased activity and size of the sebaceous glands. - Hypertrophied sebaceous glands produce excessive **sebum**, which clogs pores and creates a favorable environment for **Cutibacterium acnes** (formerly *Propionibacterium acnes*), leading to acne. *Septal deviation of nose* - **Septal deviation** is a structural abnormality within the nose, primarily affecting breathing and potentially leading to snoring or nosebleeds. - It has no direct etiopathogenic link to **acne** or **oily skin**. *Mucous gland hypertrophy* - **Mucous gland hypertrophy** typically occurs in conditions like chronic bronchitis, leading to increased mucus production in the respiratory tract. - It is unrelated to **skin oiliness** or **acne vulgaris**. *Sweat gland hypertrophy* - **Sweat gland hypertrophy** would primarily result in excessive sweating (**hyperhidrosis**). - While sweat glands contribute to skin moisture, their hypertrophy does not directly cause the **oily appearance** or **acne breakouts** described.

Question 82: The treatment of choice in nodulocystic acne is

A. Benzoyl peroxide
B. Oestrogens
C. Isotretinoin (Correct Answer)
D. Systemic steroids

Explanation: ***Isotretinoin*** - **Isotretinoin** is the most effective treatment for **severe nodulocystic acne** due to its ability to reduce sebum production, normalize follicular keratinization, decrease *Propionibacterium acnes*, and exert anti-inflammatory effects. - It is often considered in cases that are **resistant to conventional therapies** like topical agents and systemic antibiotics. *Benzoyl peroxide* - **Benzoyl peroxide** is an effective topical agent for **mild to moderate inflammatory acne** by killing *P. acnes* and reducing inflammation. - It does not have sufficient potency to treat **severe nodulocystic acne**, which involves deep-seated inflammatory lesions. *Oestrogens* - **Oestrogens** (often in oral contraceptives) can be used to treat acne in women by reducing androgen effects on sebaceous glands. - While helpful for hormonal acne, they are not the **primary treatment of choice** or sufficiently potent for **severe nodulocystic acne**. *Systemic steroids* - **Systemic steroids** are powerful anti-inflammatory agents that can be used for **short-term control** of severe inflammatory acne flares or acne fulminans. - They are not a **long-term treatment of choice** for nodulocystic acne due to their significant side effect profile and the need for a more definitive solution to prevent recurrence.

Question 83: All trans retinoic acid is used topically for -

A. Lupus vulgaris
B. Alopecia areata
C. Acne vulgaris (Correct Answer)
D. Androgenic alopecia

Explanation: ***Acne vulgaris*** - **All-trans retinoic acid (tretinoin)** is a topical retinoid that is highly effective in treating **acne vulgaris** by normalizing follicular keratinization, reducing sebum production, and possessing anti-inflammatory properties. - It helps in preventing the formation of new **comedones** and promoting the clearance of existing lesions. *Lupus vulgaris* - **Lupus vulgaris** is a cutaneous form of **tuberculosis**, typically treated with multidrug antitubercular therapy. - Retinoic acid is **not a primary treatment** for this condition. *Alopecia areata* - **Alopecia areata** is an autoimmune hair loss condition, often treated with **topical or intralesional corticosteroids**, or immunomodulators. - Topical retinoic acid is **not indicated** for its treatment. *Androgenic alopecia* - **Androgenic alopecia (male or female pattern baldness)** is primarily treated with **topical minoxidil** or **oral finasteride**. - While retinoids can stimulate hair growth, they are **not a first-line treatment** for androgenic alopecia and are sometimes used as an adjuvant to minoxidil.

Question 84: Which of the following is a primary causative factor for acne?

A. Cutibacterium acnes
B. Androgen (Correct Answer)
C. Keratin
D. Diet alone

Explanation: ***Androgen*** - **Androgens** significantly stimulate the **sebaceous glands** to produce more sebum, which is a primary factor in the development of **acne**. - Increased sebum production, combined with follicular hyperkeratinization, creates an environment conducive to the growth of **Cutibacterium acnes** and subsequent inflammation. - Androgens are considered one of the **four primary pathogenic pillars** of acne vulgaris. *Cutibacterium acnes* - **Cutibacterium acnes** (formerly *Propionibacterium acnes*) is a commensal bacterium that proliferates in the sebum-rich, anaerobic environment of clogged follicles. - While it contributes to **inflammation** and is essential in acne pathogenesis, bacterial colonization is **secondary to** the initial processes of increased sebum production and follicular obstruction driven by androgens. - Antibacterial therapy helps manage acne but doesn't address the primary hormonal trigger. *Keratin* - **Keratin** is a protein that plays a role in the formation of acne via **follicular hyperkeratinization**, leading to clogged pores. - However, the increased production of keratinized cells is often secondary to androgenic stimulation and inflammatory processes, making it a contributing factor rather than the sole primary cause. *Diet alone* - While certain **dietary factors** (e.g., high glycemic index foods, dairy) are implicated in exacerbating acne for some individuals, diet is generally considered a **modulatory factor** rather than a primary causative one. - Acne is a complex multifactorial condition, and diet alone rarely accounts for its primary onset without other hormonal or genetic influences.

Question 85: A 25-year-old male presents with scattered papules and pustules on the face, with comedones. Previous treatment with topical clindamycin showed minimal improvement. Which treatment would be most appropriate?

A. Oral isotretinoin
B. Topical benzoyl peroxide
C. Oral minocycline
D. Topical tretinoin (Correct Answer)

Explanation: ***Topical tretinoin*** - This patient presents with **comedonal and inflammatory acne** (papules and pustules with comedones) that has shown **minimal response to topical clindamycin**, a topical antibiotic. - **Topical retinoids** like tretinoin are considered **first-line therapy for comedonal acne** and are effective in treating both comedones and inflammatory lesions by normalizing follicular keratinization and reducing inflammation. They are often combined with antimicrobials for inflammatory acne. *Oral isotretinoin* - **Oral isotretinoin** is reserved for **severe, nodulocystic acne** or **moderate acne unresponsive to other therapies** due to its significant side effect profile and teratogenicity. - The patient's presentation with scattered papules and pustules suggests moderate, not severe, acne, and prior treatments have not yet included topical retinoids or oral antibiotics. *Topical benzoyl peroxide* - **Topical benzoyl peroxide** is an effective antimicrobial and comedolytic agent, often used in conjunction with topical retinoids or antibiotics for inflammatory acne. - While it could be added to the regimen, **topical tretinoin** is more specifically indicated for the comedonal component and overall improvement of acne pathology. The question asks for the **most appropriate single treatment** given current resistance concerns. *Oral minocycline* - **Oral minocycline**, an oral antibiotic, is typically used for **moderate to severe inflammatory acne**, often when topical treatments alone are insufficient or when there's a significant inflammatory component. - Given the patient's prior use of **topical clindamycin with minimal improvement**, introducing an oral antibiotic might be a consideration, but addressing the **comedonal aspect** with a topical retinoid and cycling antibiotics (if needed) is a more structured approach. Oral antibiotics are generally considered after failure of topical combination therapy.

Question 86: Which topical agent is considered first-line treatment for mild acne?

A. Tretinoin (Correct Answer)
B. Isotretinoin
C. Salicylic acid
D. Clindamycin

Explanation: ***Tretinoin*** - **Tretinoin** is a **topical retinoid** that normalizes follicular keratinization and reduces comedo formation, making it a first-line treatment for mild to moderate acne. - It works by increasing cell turnover, preventing follicles from becoming clogged, and is effective against both **comedonal** and **inflammatory acne**. *Isotretinoin* - **Isotretinoin** is an **oral retinoid** reserved for severe, recalcitrant nodular acne due to its significant systemic side effects. - It is not a topical agent and is not typically used for mild acne. *Salicylic acid* - **Salicylic acid** is a **beta-hydroxy acid** that acts as a mild comedolytic and exfoliating agent, primarily used in over-the-counter products for very mild acne or as an adjunct. - While helpful, it is generally less potent and effective than topical retinoids like tretinoin for established mild acne. *Clindamycin* - **Clindamycin** is a **topical antibiotic** used to reduce **P. acnes** bacteria and inflammation in acne. - It is typically used in combination with a retinoid or benzoyl peroxide to prevent resistance, but it does not address the primary comedonal lesion as effectively as retinoids.

Question 87: Resorcinol is used in the treatment of?

A. Lichen planus
B. Acne (Correct Answer)
C. Vitiligo
D. Scabies

Explanation: ***Acne*** - **Resorcinol** is a keratolytic agent that helps to **exfoliate skin cells** and prevents pore clogging, making it effective in treating acne. - It also has **antiseptic properties** that can help reduce bacteria associated with acne breakouts. *Lichen planus* - Treatment for lichen planus typically involves **corticosteroids** (topical or systemic), retinoids, or phototherapy, not resorcinol. - **Resorcinol** is not indicated for treating the inflammatory and immunologically mediated lesions of lichen planus. *Vitiligo* - Vitiligo is a pigmentation disorder treated with **phototherapy**, **topical corticosteroids**, calcineurin inhibitors, or depigmentation agents, not resorcinol. - Resorcinol has no known role in stimulating **melanin production** or repigmenting skin in vitiligo. *Scabies* - Scabies is treated with **scabicides** like permethrin, ivermectin, or malathion, which directly target the *Sarcoptes scabiei* mite. - Resorcinol is not an **effective scabicidal agent** and would not eradicate the mites causing scabies.

Question 88: What is the most effective treatment for nodulocystic acne?

A. Erythromycin
B. Steroids
C. Tetracycline
D. Isotretinoin (Retinoic acid) (Correct Answer)

Explanation: ***Isotretinoin (Retinoic acid)*** - **Isotretinoin** is a systemic retinoid that targets all four **pathogenic factors of acne**: sebum production, follicular hyperkeratinization, _Propionibacterium acnes_ colonization, and inflammation. - Due to its comprehensive mechanism of action, it is considered the most effective treatment for **severe nodulocystic acne** and acne unresponsive to other therapies. *Erythromycin* - **Erythromycin** is an oral antibiotic primarily used to reduce bacterial colonization (specifically _P. acnes_) and inflammation in moderate acne. - It is generally less effective for **severe nodulocystic acne** due to increasing bacterial resistance and its inability to address underlying issues like sebum overproduction. *Tetracycline* - **Tetracycline** (and its derivatives like doxycycline and minocycline) are oral antibiotics that reduce _P. acnes_ and have anti-inflammatory properties. - While effective for moderate to severe inflammatory acne, they are often insufficient for **nodulocystic acne** and do not address the fundamental problem of sebum overproduction as comprehensively as isotretinoin. *Steroids* - **Systemic steroids** may be used for a short course to reduce severe inflammation in acne fulminans or during the initial worsening phase of isotretinoin treatment. - They are not a long-term treatment for **nodulocystic acne** due to significant side effects with prolonged use and do not address the root causes of acne.

Question 89: A patient presents with comedonal acne. What is the best drug to treat this condition?

A. Topical clindamycin
B. Benzoyl peroxide
C. Topical retinoids (Correct Answer)
D. Oral contraceptives

Explanation: ***Topical retinoids*** - **Topical retinoids** are considered **first-line therapy for comedonal acne** due to their ability to normalize follicular keratinization and reduce microcomedone formation. - They work by **unclogging pores** and preventing new comedones from forming, making them highly effective for this specific type of acne. *Topical clindamycin* - **Topical clindamycin** is an **antibiotic** primarily used for its **anti-inflammatory** and **antibacterial properties** against *Propionibacterium acnes* (now *Cutibacterium acnes*) in inflammatory acne. - It has **limited efficacy** against comedones as it does not directly address the abnormal follicular keratinization that leads to their formation. *Benzoyl peroxide* - **Benzoyl peroxide** is an effective agent for acne due to its **bactericidal activity** against *C. acnes* and its **mild comedolytic properties**. - While it can help with comedones, its primary role is in **inflammatory lesions**, and **retinoids** are generally more potent for direct comedo resolution, especially in moderate to severe cases. *Oral contraceptives* - **Oral contraceptives** are primarily used for **hormonal acne** in women, often characterized by inflammatory lesions around the jawline, chin, and neck. - Their mechanism involves reducing androgen levels, which decreases sebum production, but they are **not the first-line treatment for comedonal acne specifically**, nor are they suitable for all patients.

Question 90: Potato nose is seen in ?

A. Acne vulgaris
B. Rhinosporoidosis
C. Acne rosacea (Correct Answer)
D. Lupus vulgaris

Explanation: ***Acne rosacea*** - **Potato nose**, also known as **rhinophyma**, is a severe manifestation of **acne rosacea**, characterized by thickened, red, and bumpy skin on the nose. - This condition results from **hyperplasia of sebaceous glands** and connective tissue in the nose, leading to its characteristic bulbous appearance. *Acne vulgaris* - This common skin condition is characterized by **comedones**, **papules**, **pustules**, and sometimes cysts, primarily on the face, chest, and back. - It does **not typically cause rhinophyma** or significant thickening of nasal skin. *Rhinosporoidosis* - This is a **chronic granulomatous fungal infection** affecting mucous membranes, particularly the nose. - While it can cause nasal polyps and masses, it does **not result in the sebaceous gland hyperplasia** and thickened skin characteristic of rhinophyma. *Lupus vulgaris* - Lupus vulgaris is a chronic and progressive form of **cutaneous tuberculosis**, often affecting the face. - It presents with **reddish-brown plaques** and nodules that can ulcerate and scar but does **not lead to the specific nasal hypertrophy** seen in rhinophyma.

Practice by Chapter

Acne Vulgaris: Pathophysiology

Practice Questions

Acne Vulgaris: Clinical Types

Practice Questions

Acne Vulgaris: Management

Practice Questions

Acne in Special Populations

Practice Questions

Rosacea

Practice Questions

Perioral Dermatitis

Practice Questions

Hidradenitis Suppurativa

Practice Questions

Acne Keloidalis Nuchae

Practice Questions

Acne Scarring and Its Management

Practice Questions

Psychological Aspects of Acne

Practice Questions

Diet and Acne

Practice Questions

Newer Therapies in Acne Management

Practice Questions

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