Posts by Mark Juhl, MD
A Case of Mistaken Identity: Porocarcinoma of the Scalp Initially Diagnosed as Basal Cell Carcinoma
History A 72-year-old man presented with a 2 year history of right anterior scalp lesion. The lesion was previously treated by an outside physician with cryosurgery multiple times over the course of 1 year. After a lack of resolution, the lesion was biopsied resulting in a diagnosis of basal cell carcinoma. No further treatment was…
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Evaluation of Longitudinal Melanonychia
HISTORY An 84-year-old woman with a history of melanoma of the left upper back presents with an 11 month h/o left great toe discoloration. Biopsy of left great toe was performed on 08/05/2019. Previous h/o discoloration of the right fifth toe was biopsied and was negative for malignancy. DISCUSSION What is the cause of melanonychia…
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