Abstract
A 50-year-old brown-skinned male presented to the outpatient department of Najran Medical College Hospital in November 2014 with large pink to violaceous non-pruritic patches extending from medial aspect of metacarpophalangeal joint of the small finger of the left hand to involve the whole palmar and dorsal aspect of the hand in an annular and serpigious fashion. The lesion is large-circumscribed patches having hyperkeratotic margin and central atrophy. The raised hyperkeratosis margin contains on its top a furrow along the course of the wall. The surface was verrucous, and many sides of the lesion have serpiginous border. The lesion is hairless and anhidrotic. The onset of the lesion was at the age of 35 years, and the lesion enlarges slowly and progressed to direction in annular fashion. Skin biopsy for histopathology revealed the picture of porokeratosis.
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