Dermatology Quiz

Dermatology Quiz

Recurrent dusky skin lesions

Fig 1. Erythematous lesion
Figure 1. An erythematous lesion with dusky centre located on the patient’s trunk.

A 35-year-old woman presents with erythematous lesions on her upper limbs and trunk shortly after taking antibiotics for a urinary tract infection.

Progressive pigmented purpura

Fig 1. Pigmented patches
Figure 1. Irregular pigmented patches with purpura on the pretibial areas.

A 42-year-old woman presents with progressive yellow–brown pigmentation associated with nonpalpable purpura over her shins.

An acute pustulovesicular eruption

Fig 1. Pustular lesions
Figure 1. Arciform pustulovesicular lesions on the upper arm.

A middle-aged woman presents with a recent history of tender annular and bow-shaped pustular lesions on her face, neck, and upper limbs.

Scarring alopecia with tufted folliculitis

Fig 1. Scarring alopecia
Figure 1. An irregular area of scarring alopecia on the vertex of the scalp.

A 34-year-old woman presents with an 18-month history of progressive hair loss, associated with tenderness, on her scalp. Tufted follicles and scarring alopecia were the key to diagnosis.

Skin necrosis with vascular calcification

Fig 1. Skin necrosis
Figure 1. Irregular areas of skin necrosis with dark eschar over the lower leg.

A 59-year-old woman with chronic renal failure presents with a recent history of multiple progressive, painful ulcers over the lower limbs.

Itchy papules on the trunk and limbs

Fig 1. Itchy papules
Figure 1. Multiple pale pink papules at different stages. Note the hyperpigmented areolae, increased skin markings (lichenification), and focal dark crust.

A 47-year-old woman developed persistent itchy papules on the trunk and limbs over a two-year period.