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Dermatology Quiz

Tense blisters with IgA deposits

Date Posted: 01/02/2013
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.

What is the most likely diagnosis and differential diagnosis of drug-induced blisters?

Itchy blisters on exposed skin

Date Posted: 25/01/2013
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.

What is the most likely diagnosis and the differential diagnosis?

An inflamed solar lentigo

Date Posted: 03/02/2012
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.

What is the differential diagnosis?

A persistent red papule on the thigh

Date Posted: 27/01/2012
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.

What is the differential diagnosis and what are the likely biopsy findings?

Split, atrophic nails with a pterygium

Date Posted: 20/01/2012
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.

What is the differential diagnosis and how should the nails be treated?

Parasites harvested from the skin

Date Posted: 13/01/2012
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.

What is this woman's condition and how should it be treated?

Persistent eroded lip in a young man

Date Posted: 06/01/2012
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.

What is the differential diagnosis and what is the next step in management?

A young man with a patchy beard

Date Posted: 30/12/2011
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.

What is this condition and how should it be treated?

Nodular lesion with pustules on the index finger

Date Posted: 23/12/2011
Fig 1. Pustular nodule
Figure 1. Nodule with pustules on the index finger.

A 23-year-old tropical fish fancier presents with a nodular lesion on his finger which has not responded to antibiotics.

What is this lesion and how should it be treated?

Multiple scrotal nodules with a chalky discharge

Date Posted: 16/12/2011
Fig 1. Scrotal nodules
Figure 1. Multiple nodules with chalky discharge on the scrotum.

A 45-year-old man presents with multiple nodules discharging a chalky substance on his scrotum.

What is the diagnosis of these nodules and how should they be treated?

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