REPORT OF A CASE
A 56-year-old man had a 25-year history of multiple gelatinous vesicular-appearing coalescent papules, present since birth, over his right posterior hip and thigh. The fluid present in the papules was usually straw-colored, although sometimes it appeared to be slightly bloody. Over the years, new lesions developed distally in a linear distribution toward the right popliteal fossa. The papules were asymptomatic and there was no swelling of the surrounding subcutaneous tissue. The eruption was not present in any other part of the body. His family history was unremarkable.Physical examination revealed elevated, gelatinousappearing papules and plaques on the right posterior thigh, extending toward the popliteal fossa and located primarily in the distribution of the S1 dermatome (Figs 1 and 2). The lesions ranged in size from 0.5 to 6.0 cm. A skin biopsy specimen of one of these lesions was taken (Fig 3).What is your diagnosis?
Gupta AK, Ellis CN, Gorsulowsky DC. Chronic Zosteriform Eruption of the Lower Extremity. Arch Dermatol. 1988;124(2):267-268. doi:10.1001/archderm.1988.01670020085025