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Dermatology Quiz

Tufted hairs wrapped in asbestos-like scale

Fig 1. Hair scale
Figure 1. Thick asbestos-like scale wrapped around tufts of scalp hair.

A woman presents with adherent asbestos-like scale bound around tufts of hair within her scalp.

Acral blisters with arthritis

Fig 1. Acral blisters
Figure 1. Acral blisters and erosions on the patient’s hand.

Over two months, a woman developed nonpruritic blisters and fragile skin on the dorsal surfaces of her hands. These developed after commencing naproxen for arthritis.

Tense blisters with IgA deposits

Fig 1. Blisters
Figure 1. Large blisters on the palm.

A woman, post cardiac surgery, develops large blisters from urticarial lesions on her palms and soles after receiving vancomycin and ciprofloxacin for a postsurgical wound infection.

Itchy blisters on exposed skin

Fig 1. Blisters
Figure 1. Blisters at different stages on the patient’s lower leg.

A woman presents with a two-week history of pruritic blisters, at various stages of evolution, over her limbs.

An inflamed solar lentigo

Fig 1. Inflamed solar lentigo
Figure 1. Sharply demarcated lesion with a cobblestone surface. Note surrounding sun damage, freckles and solar lentigines.

A 65-year-old man presents with a recently inflamed, dusky red-brown lesion on his chest that displayed multiple freckles and solar lentigines.

A persistent red papule on the thigh

Fig 1. Red papule
Figure 1. Symmetrical moist red papule with a collarette of scale on the thigh.

A 54-year-old man presented with a longstanding, symmetrical, small, red papule on his thigh that had not grown and was asymptomatic.

Split, atrophic nails with a pterygium

Fig 1. Atrophic nail plates
Figure 1. Thumbnails demonstrating atrophic nail plates with longstanding ridging, distal clefting and lamellar peeling. The left thumbnail also has a triangular scar extending from the proximal nail fold (pterygium).

A 58-year-old woman presents with atrophic and split fingernails, partially covered by a web of tissue.

Parasites harvested from the skin

Figure 1. Irregularly shaped excoriation on the forehead.

A 53-year-old woman presents with crawling sensations and an excoriation on her forehead. She brings a sample of the ‘parasites’ she says she has extracted from the lesion.

Persistent eroded lip in a young man

Fig 1. Eroded plaque
Figure 1. Eroded plaque on the lower lip.

A 29-year-old man presents with a persistent eroded and indurated plaque on his lower lip which has not responded to topical treatments.

A young man with a patchy beard

Fig 1. Beard hair loss
Figure 1. Patchy loss of beard hair with white stubble representing arrested hair growth.

A 24-year-old man presents with progressive loss of his beard hair in patches.

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