Specialty Certificate Examination in Dermatology (SCE) — Questions and Answers

Question 1: A virus-induced epidermal growth is referred to as a?

nevus
melanoma
impetigo
verruca (Correct answer)

Correct answer: verruca

A verruca, commonly known as a wart, is a small, rough growth on the skin or mucous membrane caused by a viral infection, specifically by the human papillomavirus (HPV). These growths are benign and can appear anywhere on the body, varying in size and shape depending on the type of HPV and location.

Question 2: What stage of growth is a hair follicle in?

Telogen
Growagen
Catagen
Anagen (Correct answer)

Correct answer: Anagen

The anagen phase is the active growth phase of hair follicles, where hair cells rapidly divide and new hair is formed. This is the longest stage of the hair cycle, determining the length of the hair.

Question 3: A child presents with honey-crusted erosions around the mouth and nose. Gram stain shows gram-positive cocci in clusters. What is the most likely causative organism?

Staphylococcus aureus (Correct answer)
Enterococcus faecalis
Streptococcus pyogenes
Staphylococcus epidermidis

Correct answer: Staphylococcus aureus

Non-bullous impetigo is most commonly caused by Staphylococcus aureus, which presents with honey-colored crusts in children.

Question 4: What is the most common benign skin tumor in adults?

Seborrheic keratosis (Correct answer)
Epidermal inclusion cyst
Dermatofibroma
Lipoma

Correct answer: Seborrheic keratosis

Seborrheic keratosis is the most common benign epidermal tumor in adults, increasing in number and size with age and typically requiring no treatment.

Question 5: What is the mechanism by which UV radiation causes DNA damage leading to skin cancer?

Deamination of cytosine to uracil
Formation of cyclobutane pyrimidine dimers (CPDs) and 6-4 photoproducts in DNA (Correct answer)
Direct strand breaks in double-stranded DNA
Generation of reactive oxygen species only

Correct answer: Formation of cyclobutane pyrimidine dimers (CPDs) and 6-4 photoproducts in DNA

UVB radiation causes direct DNA damage by inducing formation of cyclobutane pyrimidine dimers (CPDs) and 6-4 photoproducts between adjacent pyrimidine bases, causing characteristic C→T mutations.

Question 6: Which skin condition, historically called 'the great imitator,' can mimic virtually any dermatological disease in its secondary stage?

Drug hypersensitivity syndrome
Secondary syphilis (Correct answer)
Pityriasis rosea
Systemic lupus erythematosus

Correct answer: Secondary syphilis

Secondary syphilis produces a wide variety of skin manifestations—maculopapular rashes, condylomata lata, alopecia—earning syphilis the nickname 'the great imitator.'

Question 7: The 'saw-tooth' pattern of rete ridges on skin histology is most characteristic of which condition?

Lichen planus (Correct answer)
Psoriasis
Seborrheic dermatitis
Systemic lupus erythematosus

Correct answer: Lichen planus

Lichen planus shows irregular, saw-tooth shaped rete ridges with a band-like lymphocytic infiltrate hugging the dermal-epidermal junction.

Question 8: What is the recommended first-line systemic treatment for severe atopic dermatitis in adults when topical therapy fails?

Dupilumab (IL-4Rα biologic) (Correct answer)
Systemic cyclosporine
Oral prednisone
Methotrexate

Correct answer: Dupilumab (IL-4Rα biologic)

Dupilumab is now the preferred first-line systemic agent for moderate-to-severe atopic dermatitis in adults, offering superior efficacy and safety compared to traditional immunosuppressants.

Question 9: A 35-year-old woman has butterfly-shaped facial erythema, photosensitivity, and a positive ANA. Which antibody is most specific for SLE?

Anti-histone
Anti-Ro (SSA)
Anti-La (SSB)
Anti-dsDNA (Correct answer)

Correct answer: Anti-dsDNA

Anti-dsDNA antibodies are highly specific for SLE and their titers often correlate with disease activity, particularly lupus nephritis.

Question 10: Pityriasis versicolor is caused by which organism?

Pityrosporum orbiculare (Malassezia globosa) (Correct answer)
Malassezia furfur
Trichophyton rubrum
Candida albicans

Correct answer: Pityrosporum orbiculare (Malassezia globosa)

Pityriasis versicolor is most often caused by Malassezia globosa (formerly classified as Pityrosporum orbiculare), a lipophilic yeast.

Question 11: What is the primary mechanism by which benzoyl peroxide treats acne?

Releases free oxygen radicals that are bactericidal against Cutibacterium acnes (Correct answer)
Modulates toll-like receptor 2 signaling
Blocks androgen receptors in sebaceous glands
Inhibits 5-alpha reductase reducing sebum production

Correct answer: Releases free oxygen radicals that are bactericidal against Cutibacterium acnes

Benzoyl peroxide is bactericidal against C. acnes through the release of reactive oxygen species, and critically, it does not induce antibiotic resistance.

Question 12: Which histological feature best characterizes Kaposi sarcoma and distinguishes it from other vascular tumors?

Cavernous dilated vascular channels lined by flat endothelium
Glomeruloid vascular structures within dermal nodules
Epithelioid endothelial cells with hobnail morphology
Slit-like vascular spaces with spindle cells and extravasated erythrocytes (Correct answer)

Correct answer: Slit-like vascular spaces with spindle cells and extravasated erythrocytes

Kaposi sarcoma shows slit-like irregular vascular spaces lined by spindle cells with extravasated red blood cells and hemosiderin deposition, reflecting its HHV-8-driven spindle cell proliferation.

Question 13: Sentinel lymph node biopsy is recommended for melanomas with Breslow thickness greater than which measurement?

0.5 mm
2.0 mm
1.5 mm
0.8 mm (or 0.8–1.0 mm with high-risk features) (Correct answer)

Correct answer: 0.8 mm (or 0.8–1.0 mm with high-risk features)

Current NCCN guidelines recommend sentinel lymph node biopsy for melanomas >0.8 mm in Breslow thickness, or for thinner melanomas with ulceration or high mitotic rate.

Question 14: What is the approximate total surface area of the skin in an average adult human?

1.5–2 square meters (Correct answer)
0.5–1 square meter
2.5–3 square meters
3–4 square meters

Correct answer: 1.5–2 square meters

The adult human skin covers approximately 1.5–2 square meters, making it the body's largest organ.

Question 15: Both clotrimazole and nystatin are?

anti-itch creams
topical antibiotics
used to treat eczema
topical antifungals (Correct answer)

Correct answer: topical antifungals

Clotrimazole and nystatin are both well-known medications used to treat fungal infections. They are commonly available as topical creams, ointments, or powders and work by inhibiting the growth of fungi on the skin or mucous membranes. They are effective against a wide range of fungal pathogens.

Question 16: Kaposi sarcoma is associated with which herpesvirus, and which patient population is classically affected in epidemic KS?

EBV; organ transplant recipients
HHV-6; elderly Mediterranean men
CMV; immunosuppressed patients
HHV-8 (KSHV); patients with advanced HIV/AIDS (Correct answer)

Correct answer: HHV-8 (KSHV); patients with advanced HIV/AIDS

Human herpesvirus 8 (Kaposi sarcoma-associated herpesvirus) causes all forms of KS; epidemic KS affecting HIV-positive patients with AIDS was the most prevalent form during the AIDS epidemic.

Question 17: What kind of cyst typically develops on the vulva, scrotum, and scalp and includes yellowish sebum?

ulcer
sebaceous cyst (Correct answer)
papule
vesicle

Correct answer: sebaceous cyst

A sebaceous cyst, also known as an epidermoid cyst, is a common non-cancerous cyst that arises from a blocked sebaceous gland or hair follicle. These cysts typically contain a yellowish, cheesy, or oily substance (sebum) and are frequently found on areas with many sebaceous glands, such as the scalp, face, neck, back, and sometimes the vulva or scrotum.

Question 18: Which sunscreen ingredient provides the broadest UVA protection and is commonly used in US formulations?

Octinoxate
Oxybenzone
Homosalate
Avobenzone (Parsol 1789) (Correct answer)

Correct answer: Avobenzone (Parsol 1789)

Avobenzone is the only FDA-approved organic UV filter providing full UVA protection (320–400 nm) but requires photostabilizers (like octocrylene) as it degrades with UV exposure.

Question 19: Which type of melanoma is most commonly found on the palms, soles, and nail beds?

Nodular melanoma
Superficial spreading melanoma
Lentigo maligna melanoma
Acral lentiginous melanoma (Correct answer)

Correct answer: Acral lentiginous melanoma

Acral lentiginous melanoma is the most common melanoma subtype in darker-skinned individuals and arises on acral surfaces including palms, soles, and subungual regions.

Question 20: Which topical medication is first-line for treating cradle cap (infantile seborrheic dermatitis) on the scalp?

Salicylic acid peels
Coal tar preparations
High-potency topical corticosteroids
Gentle emollient oils and mild antifungal shampoos (Correct answer)

Correct answer: Gentle emollient oils and mild antifungal shampoos

Cradle cap is managed with gentle emollient oils to loosen scales followed by mild ketoconazole or antifungal shampoos, reserving low-potency steroids for resistant cases.

Question 21: What condition cause a scaly dermatitis to afflict areas of the skin that receive oil gland supply?

eczema
contact dermatitis
chronic dermatitis
seborrheic dermatitis (Correct answer)

Correct answer: seborrheic dermatitis

Seborrheic dermatitis is a common inflammatory skin condition characterized by scaly patches, redness, and often greasy skin. It specifically affects areas of the body rich in sebaceous (oil) glands, such as the scalp, face (around the nose, eyebrows), and chest. This condition is frequently associated with the overgrowth of a yeast called Malassezia, which thrives in oily environments.

Question 22: Which actinic keratosis feature suggests highest risk of progression to invasive SCC?

Hypertrophic/thick AK with induration and tenderness (Correct answer)
AK on the forearm
Multiple thin AKs on the scalp
Flat pigmented AK

Correct answer: Hypertrophic/thick AK with induration and tenderness

Hypertrophic, indurated, or tender actinic keratoses have the highest risk of harboring or progressing to invasive SCC and warrant aggressive treatment or biopsy.

Question 23: What are moles that have the potential to turn into malignant melanoma?

dysplastic nevi (Correct answer)
verrucae
giant nevi
intraderma nevi

Correct answer: dysplastic nevi

Dysplastic nevi are atypical moles that have irregular borders, varied color, and are often larger than common moles. While most dysplastic nevi do not become melanoma, they are considered precursors to malignant melanoma and indicate an increased risk for developing this serious skin cancer. Regular monitoring by a dermatologist is crucial for individuals with these moles.

Question 24: What kind of follicles do fur-bearing animals have?

Simple
Intermediate
Compound (Correct answer)
Fuzzy

Correct answer: Compound

Fur-bearing animals, such as dogs and cats, typically possess compound hair follicles. These follicles are unique because they produce multiple hairs (a primary guard hair and several secondary undercoat hairs) from a single pore, contributing to their dense fur coat.

Question 25: What is the correct depth of injection for hyaluronic acid filler used to treat nasolabial folds?

Deep dermis to subcutaneous junction (Correct answer)
Superficial epidermis
Subperiosteal plane
Muscle belly

Correct answer: Deep dermis to subcutaneous junction

Nasolabial fold correction with HA filler requires injection at the deep dermis to subcutaneous junction to provide volume support and lift without visibility of filler.

Question 26: 'Naked granulomas' (non-caseating granulomas with sparse surrounding lymphocytes) in skin biopsies are characteristic of which systemic condition?

Crohn's disease with cutaneous involvement
Rheumatoid nodule
Sarcoidosis (Correct answer)
Granuloma annulare

Correct answer: Sarcoidosis

Sarcoidosis produces 'naked' non-caseating epithelioid granulomas with minimal surrounding lymphocytic infiltrate, often with Langhans giant cells and inclusion bodies.

Question 27: What is the vehicle that determines the potency classification of topical corticosteroids?

pH of the preparation
Concentration alone determines potency
The formulation (ointment > gel > cream > lotion > solution) significantly affects potency (Correct answer)
Molecular weight of the steroid

Correct answer: The formulation (ointment > gel > cream > lotion > solution) significantly affects potency

The same corticosteroid molecule can have different potency classes depending on the vehicle — ointments provide the greatest occlusion and skin penetration, followed by gels, creams, and lotions.

Question 28: Civatte bodies (colloid/hyaline bodies) are characteristic of which dermatological condition?

Psoriasis
Pemphigus vulgaris
Lichen planus (Correct answer)
Dermatitis herpetiformis

Correct answer: Lichen planus

Civatte bodies are apoptotic keratinocytes (eosinophilic globules) seen at the dermal-epidermal junction in lichen planus due to interface dermatitis.

Question 29: Which finding on dermoscopy is most characteristic of a melanoma?

Atypical pigment network with regression (Correct answer)
Milia-like cysts
Comma vessels
Arborizing vessels

Correct answer: Atypical pigment network with regression

An atypical (irregular/broadened) pigment network with areas of regression is a major dermoscopic feature suggestive of melanoma.

Question 30: What is alopecia?

Never where you want it to be
Full or partial hair loss (Correct answer)
Only full hair loss
Difficult for men to deal with

Correct answer: Full or partial hair loss

Alopecia is the medical term for hair loss, which can manifest as either complete absence of hair in an area (full hair loss) or a thinning of hair (partial hair loss). It can affect any part of the body and have various underlying causes.

Question 31: Chemical peels using trichloroacetic acid (TCA) at 30–40% penetrate to which skin layer?

Subcutaneous fat
Papillary to upper reticular dermis (Correct answer)
Stratum corneum only
Deep reticular dermis

Correct answer: Papillary to upper reticular dermis

Medium-depth TCA peels at 30–40% penetrate through the epidermis to the papillary and upper reticular dermis, making them effective for actinic keratoses and dyspigmentation.

Specialty Certificate Examination in Dermatology (SCE)

The UK Specialty Certificate Examination in Dermatology tests specialist-level knowledge across the full dermatology curriculum using a best-of-five format. It assesses general dermatology, dermatopathology, surgical procedures, pharmacology, and clinical management.

Questions

35 min

Time Limit

65%

To Pass

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