Acne Scarring and Its Management — MCQs
A 24-year-old woman presents with multiple nodular, cystic, and pustular lesions on her face and shoulders for 2 years. What is the drug of choice for her treatment?
Identify the pattern of abrasion shown in the image below.
A girl about to marry has comedonal acne. Drug to treat such a case is:
Which of the following statements about keloids is MOST true?
Which is a specific lesion of acne vulgaris?
ECV is absolutely contraindicated in all except :
A young boy with oily skin presents with acne as shown. What is the appropriate treatment?
What is the latest retinoid drug used in acne?
What are the treatment options for acne vulgaris?
An 18-year-old girl presents with predominantly comedonal acne. What is the first-line treatment?
Acne Scarring and Its Management Indian Medical PG Practice Questions and MCQs
Question 1: A 24-year-old woman presents with multiple nodular, cystic, and pustular lesions on her face and shoulders for 2 years. What is the drug of choice for her treatment?
- A. Isotretinoin (Correct Answer)
- B. Azithromycin
- C. Doxycycline
- D. Acitretin
Explanation: ***Isotretinoin*** - This patient presents with **severe nodulocystic acne**, characterized by multiple nodular, cystic, and pustular lesions, which is the primary indication for oral isotretinoin. - Isotretinoin is a potent systemic retinoid that **reduces sebum production**, inhibits _Propionibacterium acnes_, normalizes keratinization, and has anti-inflammatory effects, leading to significant and often long-term remission. *Azithromycin* - Azithromycin is an **antibiotic** that can be used for inflammatory acne, but it is typically reserved for patients who cannot tolerate or are resistant to other tetracycline-class antibiotics. - While it has anti-inflammatory properties, it is generally **less effective for severe nodulocystic acne** compared to isotretinoin. *Doxycycline* - Doxycycline is a **tetracycline antibiotic** commonly used for moderate to severe inflammatory acne due to its anti-inflammatory effects and ability to reduce _P. acnes_ bacteria. - However, for **severe nodulocystic acne**, systemic antibiotics like doxycycline are often insufficient as monotherapy and **isotretinoin is the preferred treatment** for its superior efficacy in such cases. *Acitretin* - Acitretin is a systemic retinoid primarily used for **severe psoriasis** and other keratinization disorders. - It is **not indicated for the treatment of acne** and has a different safety profile and mechanism of action compared to isotretinoin.
Question 2: Identify the pattern of abrasion shown in the image below.
- A. Pressure abrasion
- B. Ligature mark (Correct Answer)
- C. Graze abrasion
- D. Imprint abrasion
Explanation: ***Ligature mark*** - The image clearly displays a **linear impression** on the neck, consistent with a **ligature mark**, which is an abrasion caused by a constricting object. - This type of abrasion is often seen in cases of **strangulation or hanging**, where a cord or similar item tightens around the neck. *Pressure abrasion* - Pressure abrasions are typically caused by **blunt forceful contact** with a surface, resulting in a scraped or grazed appearance, which differs from the distinct linear mark shown. - They are usually broad and irregular, not forming a clear, thin line as seen in the image. *Graze abrasion* - Graze abrasions, also known as scrapes, involve the **superficial removal of the epidermis** due to friction against a rough surface. - They tend to be spread out and irregular, lacking the deep, circumscribed linear pattern characteristic of a ligature mark. *Imprint abrasion* - Imprint abrasions reflect the **exact pattern of the impacting object** (e.g., tire track, weapon pattern), which is not evident in the image. - While a ligature itself can leave an imprint, the term "imprint abrasion" is usually reserved for more complex patterns than a simple linear groove.
Question 3: A girl about to marry has comedonal acne. Drug to treat such a case is:
- A. Topical antibiotic
- B. Retinoids (Correct Answer)
- C. Estrogen
- D. Benzoyl peroxide
Explanation: ***Retinoids*** - **Topical retinoids** (e.g., tretinoin, adapalene) are the cornerstone of comedonal acne treatment as they normalize follicular keratinization, preventing the formation of microcomedones and promoting their expulsion. - They work by **reducing hyperkeratinization** and the adhesion of epidermal cells within the follicle, which directly targets the underlying pathology of comedonal acne. *Topical antibiotic* - Topical antibiotics (e.g., clindamycin, erythromycin) primarily target the **bacterial component** of acne, specifically *Cutibacterium acnes*, and have anti-inflammatory effects. - They are less effective for purely **comedonal acne**, which lacks significant inflammatory lesions or bacterial overgrowth as the primary issue. *Estrogen* - Estrogen, often combined with progestin in **oral contraceptives**, can treat acne by reducing androgen levels and thus decreasing sebum production. - This is typically used for **hormonal acne** with inflammatory lesions, and it is not the first-line treatment for purely comedonal acne. *Benzoyl peroxide* - **Benzoyl peroxide** is an antimicrobial agent and has comedolytic properties, meaning it helps to shed dead skin cells and prevent clogged pores. - While it has some benefit, it is often more effective for **inflammatory acne** due to its antimicrobial action and is secondary to retinoids for primary comedonal treatment.
Question 4: Which of the following statements about keloids is MOST true?
- A. Keloids may extend beyond the original wound. (Correct Answer)
- B. Extended excision is often not the treatment of choice.
- C. It contains growth factors.
- D. None of the options.
Explanation: ***Keloids may extend beyond the original wound.*** - Keloids are characterized by their **overgrowth** beyond the boundaries of the original injury. - This distinguishes them from **hypertrophic scars**, which remain confined to the wound edges. *Extended excision is often not the treatment of choice.* - **Excision alone** is usually insufficient for keloids and can even be counterproductive, as the recurring wound often leads to a larger keloid. - While excision can be part of a treatment plan, it is typically combined with supplementary therapies like **steroid injections** or **radiation therapy** to prevent recurrence. *It contains growth factors.* - While keloids involve abnormal fibroblast activity and deposition of **extracellular matrix**, the statement that it "contains growth factors" is too vague and not a defining characteristic that differentiates it from a range of other tissues or conditions. - Many tissues and healing processes involve growth factors, so this statement alone does not provide a specific or most true characteristic of keloids. *None of the options.* - This option is incorrect because the statement that **keloids may extend beyond the original wound** is a hallmark characteristic of keloids and is definitively true.
Question 5: Which is a specific lesion of acne vulgaris?
- A. Wheals
- B. Papules
- C. Comedones (Correct Answer)
- D. Pustules
Explanation: ***Comedones*** - **Comedones are the pathognomonic (specific) lesion of acne vulgaris** and represent the primary lesion from which all other acne lesions develop - They result from follicular obstruction by sebum and keratin, forming **blackheads (open comedones)** and **whiteheads (closed comedones)** - Formed due to retention of follicular keratinocytes and increased sebum production, leading to characteristic **clogged pores** - Without comedones, a diagnosis of acne vulgaris cannot be made *Papules* - While papules are a common finding in acne vulgaris, they are **secondary inflammatory lesions** that arise from rupture and inflammation of comedones - They are small, solid, elevated lesions <1 cm in diameter representing an inflammatory response to follicular contents - Not specific to acne as papules occur in many other dermatological conditions *Pustules* - Pustules are also secondary inflammatory lesions in acne, representing **papules that have accumulated purulent material (pus)** - They appear as visible collections of pus surrounded by an inflammatory halo - Indicate a more advanced stage of the acne inflammatory process, but are not the defining lesion *Wheals* - **Wheals are NOT a feature of acne vulgaris** and are instead associated with **urticaria (hives)** or allergic reactions - They are transient, erythematous, edematous plaques resulting from histamine release leading to dermal edema - Completely unrelated to the pathophysiology of acne
Question 6: ECV is absolutely contraindicated in all except :
- A. Previous LICS scar (Correct Answer)
- B. Septate uterus
- C. Severe pre-eclampsia
- D. Placenta previa
Explanation: ***Previous LICS scar*** - A **previous lower uterine segment C-section (LICS) scar** is considered a **relative contraindication**, not an absolute contraindication for ECV. - Current guidelines (ACOG, RCOG) indicate that ECV can be attempted in carefully selected women with one prior cesarean delivery, though success rates may be lower. - While there is a theoretical increased risk of **uterine rupture** or **scar dehiscence**, studies have shown this risk remains low (approximately 0.02-0.08%), and many practitioners will offer ECV after thorough counseling and informed consent. - **This is the correct answer** - it is NOT an absolute contraindication. *Septate uterus* - A **septate uterus** (uterine anomaly) is generally considered a **relative contraindication** or significant limiting factor for ECV, though some sources treat it more strictly. - The uterine septum can impair fetal manipulation and reduce success rates significantly, making ECV technically challenging and potentially less likely to succeed. - While not universally classified as "absolute," severe uterine anomalies create substantial barriers to successful version and increase procedural risks, leading many practitioners to avoid ECV in these cases. *Severe pre-eclampsia* - **Severe pre-eclampsia** is an **absolute contraindication** for ECV. - The procedure can exacerbate maternal hypertension, increase risk of **seizures (eclampsia)**, and trigger **placental abruption** or **fetal compromise**. - The physiological stress of ECV is contraindicated in an already unstable maternal-fetal condition. *Placenta previa* - **Placenta previa** is an **absolute contraindication** for ECV. - Any uterine or fetal manipulation carries significant risk of causing **severe hemorrhage** and **placental separation**. - The abnormal placental location makes vaginal delivery contraindicated regardless of presentation, and ECV would serve no clinical purpose while exposing mother and fetus to serious bleeding risks.
Question 7: A young boy with oily skin presents with acne as shown. What is the appropriate treatment?
- A. Oral isotretinoin
- B. Oral steroid
- C. Topical retinoic acid (Correct Answer)
- D. Benzoyl peroxide
Explanation: ***Topical retinoic acid*** - The image shows **comedonal acne** with numerous small bumps, which typically responds well to topical retinoids like retinoic acid. - **Topical retinoids** work by normalizing follicular keratinization and reducing comedone formation, making them the **first-line treatment** for comedonal and mild to moderate inflammatory acne. - Retinoids are superior to other agents for comedonal acne due to their comedolytic properties. *Oral isotretinoin* - **Oral isotretinoin** is reserved for **severe cystic or nodular acne**, or acne that is unresponsive to other treatments, which does not appear to be the case here. - It has significant side effects and requires close monitoring, making it inappropriate for the initial treatment of mild to moderate acne. *Oral steroid* - **Oral steroids** are not a primary treatment for acne and are usually reserved for severe, **fulminant acne** (like acne conglobata) or to manage acute exacerbations of inflammatory acne due to their numerous side effects. - Their primary role is potent **anti-inflammatory action**, but they do not address the underlying pathogenesis of acne. *Benzoyl peroxide* - **Benzoyl peroxide** is effective against **inflammatory acne** due to its antibacterial and keratolytic properties. - While it can be used for comedonal acne and is often combined with retinoids for enhanced efficacy, **topical retinoids are preferred as monotherapy** for predominantly comedonal acne as shown in this image. - Benzoyl peroxide is particularly useful when there are inflammatory lesions (papules, pustules) present.
Question 8: What is the latest retinoid drug used in acne?
- A. Retinoic acid
- B. Clindamycin
- C. Adapalane (Correct Answer)
- D. Azelaic acid
Explanation: **Explanation:** **Adapalane** is the correct answer as it represents a **third-generation topical retinoid**. Unlike first-generation retinoids, adapalane is a naphthoic acid derivative that selectively binds to **Retinoic Acid Receptors (RAR-β and RAR-γ)**. This selectivity, combined with its lipophilic nature, allows it to penetrate the pilosebaceous unit more effectively while causing significantly less skin irritation (redness and peeling) compared to older agents like Tretinoin. It is currently the standard "latest" generation retinoid frequently tested in this context for its stability and improved safety profile. **Analysis of Incorrect Options:** * **Retinoic acid (Tretinoin):** This is a **first-generation** retinoid. While highly effective, it is more photolabile (degrades in sunlight) and generally more irritating to the skin than Adapalane. * **Clindamycin:** This is a **topical antibiotic**, not a retinoid. It acts by inhibiting protein synthesis in *Cutibacterium acnes* but does not possess the comedolytic properties of retinoids. * **Azelaic acid:** This is a dicarboxylic acid with antibacterial and antikeratinizing properties. While used in acne (especially for post-inflammatory hyperpigmentation), it is **not a retinoid**. **High-Yield Clinical Pearls for NEET-PG:** * **Generations of Retinoids:** * 1st: Tretinoin, Isotretinoin. * 2nd: Etretinate, Acitretin (used in Psoriasis). * 3rd: Adapalane, Tazarotene. * 4th: **Trifarotene** (The most recent, highly selective for RAR-γ). * **Mechanism:** Retinoids are **comedolytic**; they normalize follicular keratinization to prevent microcomedone formation. * **Teratogenicity:** All oral retinoids are strictly contraindicated in pregnancy (Category X). Isotretinoin requires a mandatory contraception period (1 month post-discontinuation).
Question 9: What are the treatment options for acne vulgaris?
- A. Dapsone
- B. Oral Minocycline
- C. Isotretinoin
- D. All the above (Correct Answer)
Explanation: **Explanation:** Acne vulgaris is a chronic inflammatory disease of the pilosebaceous unit. Its management is multifaceted, targeting the four key pathogenic factors: follicular hyperkeratinization, sebum production, *Cutibacterium acnes* colonization, and inflammation. * **Dapsone (Option A):** Topical dapsone (5% or 7.5% gel) is an effective treatment, particularly for inflammatory acne in adult females. It possesses potent anti-inflammatory properties. While oral dapsone is rarely used for routine acne due to side effects, it remains a recognized systemic option for severe, recalcitrant variants like Acne Fulminans. * **Oral Minocycline (Option B):** This is a second-generation tetracycline and a mainstay for moderate-to-severe inflammatory acne. It is highly lipophilic, ensuring excellent penetration into the pilosebaceous unit. It acts by inhibiting protein synthesis in *C. acnes* and reducing chemotactic factors. * **Isotretinoin (Option C):** This oral retinoid is the "gold standard" for severe nodulocystic acne. It is the only drug that addresses all four pathogenic mechanisms of acne. Since all three medications are established therapeutic options, **Option D (All the above)** is the correct answer. **Clinical Pearls for NEET-PG:** * **Isotretinoin:** Highly teratogenic (Category X); requires two forms of contraception and monthly pregnancy tests (IPLEDGE program). It can cause dryness (cheilitis is the most common side effect) and elevated triglycerides. * **Minocycline Side Effects:** Can cause blue-grey skin pigmentation, vestibular toxicity (vertigo), and drug-induced lupus. * **First-line for Mild Acne:** Topical retinoids (Adapalene) + Benzoyl Peroxide. * **Acne Fulminans:** The most severe form; treated with systemic steroids followed by low-dose Isotretinoin.
Question 10: An 18-year-old girl presents with predominantly comedonal acne. What is the first-line treatment?
- A. Topical retinoids (Correct Answer)
- B. Systemic retinoids
- C. Systemic antibiotics
- D. Topical steroids
Explanation: **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.
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