A Case Report of Multiple Cylindroma with Immunohistochemical Features

Cylindroma is a benign skin appendageal tumor arising from pluripotent stem cells in the follicle. Multiple cylindroma typically occurs as a component of Brooke-Spiegler syndrome or as the only skin lesion of familial cylindromatosis. We herein report an unusual case of multiple cylindroma involving the trunk without any other features of Brooke-Spiegler syndrome and no family history supporting the possibility of familial cylindromatosis. Immunohistochemical features of CYLD and NF-κB, which are involved in the pathogenesis of cylindroma, in the tumors are also presented.