By Richard A. Krathen, MD, and Sylvia Hsu, MD

All articles by By Richard A. Krathen, MD, and Sylvia Hsu, MD

Annular purpuric rash on the lower extremities

December 12, 2008

A 47-year-old man had a three-month history of intermittent rash on the lower legs. The rash consisted of symmetric ringlike coalescing purpuric patches in a netlike pattern.

Dermatology Clinic

Draining jaw lesion following treatment for a dental abscess

By Richard A. Krathen, MD, and Sylvia Hsu, MD

November 4, 2008

A 63-year-old woman was treated for a dental abscess on her right lower jaw

Dermatology Clinic

Asymptomatic plaques on the legs of a diabetic patient

By Richard A. Krathen, MD, and Sylvia Hsu, MD

May 19, 2007

A 47-year-old Caucasian woman presented with a two-year history of asymptomatic, progressive skin lesions that had begun on the anterior lower legs and spread to the forearms and hands. The initial erythematous papules evolved into plaques that exhibited central atrophic, hyperpigmented, yellowish skin with telangiectasia and an active erythematous border. The woman’s non-insulin-dependent (type 2)…

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By Richard A. Krathen, MD, and Sylvia Hsu, MD

All articles by By Richard A. Krathen, MD, and Sylvia Hsu, MD

Annular purpuric rash on the lower extremities

Draining jaw lesion following treatment for a dental abscess

Asymptomatic plaques on the legs of a diabetic patient

Keratotic palms paired with brittle nails