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Dermatology Quiz

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?

Alopecia with broken hairs

Date Posted: 11/11/2011
Fig 1. Alopecia
Figure 1. Alopecia demonstrating irregular margins with partial regrowth and broken hairs of uneven length.

A 33-year-old woman presents with a 12-month history of an asymmetrical nonscarring alopecia.

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

Progressive infiltration of the upper body

Date Posted: 04/11/2011
Fig 1. Thickened skin
Figure 1. Grossly thickened skin producing coarse folds.

A 37-year-old man with diabetes presents with a long history of progressive swelling of the upper body.

What is the differential diagnosis?

A persistent red nodule on the nose

Date Posted: 28/10/2011
Fig 1. Nodule on nose
Figure 1. Erythematous nodule on the nose.

A 55-year-old woman presents with an asymptomatic red nodule present for eight months on her nose.

What conditions should be considered?

Infiltrated pretibial plaques

Date Posted: 14/10/2011
Fig 1. Pretibial skin
Figure 1. Waxy, infiltrated pretibial skin.

A 57-year-old woman presents with waxy infiltrated plaques on her legs and feet. Biopsy revealed diffuse dermal mucinosis.

What is the cause of these lesions and how should they be treated?

Irritable rash in the beard area

Date Posted: 07/10/2011
Fig 1. Irritable rash
Figure 1. Irritated follicular papules on the cheek and neck.

A 37-year-old man presented with a papular rash and irritated skin in the beard area that had made shaving difficult.

What could be the cause?

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