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Dermatology Quiz

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?

Translucent, reddish-blue nodule on the lip

Date Posted: 09/12/2011
Fig 1. Translucent nodule
Figure 1. Reddish-blue translucent nodule on the lower lip.

A 28-year-old man presents with an asymptomatic reddish-blue translucent nodule on his lip.

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

Recurrent painful mouth ulcers

Date Posted: 02/12/2011
Fig 1. Mouth ulcers
Figure 1. Small painful ulcers on the mucosal surface of the lower lip.

A 36-year-old man presents with recurrent, painful ulcers on his lips and mobile oral mucosa.

What are these lesions and their differential diagnosis and treatment?

Itchy, rippled skin pigmentation

Date Posted: 25/11/2011
Fig 1. Hyperpigmentation
Figure 1. Marked rippled hyperpigmentation over the upper back.

A 39-year-old man presented with a longstanding, widespread, itchy, brown pigmentation with a rippled pattern on his trunk and limbs.

What is this condition and how should it be treated?

Alopecia with dull, broken hairs

Date Posted: 18/11/2011
Fig 1. Diffuse alopecia
Figure 1. Large area of diffuse alopecia with dull, broken hairs.

A 33-year-old man presents with a large area of hair loss and damaged hair on his scalp.

What is the differential diagnosis and what tests and treatment should be selected?

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