Dermoscopy Of The Month: Dermoscopic Finding of Pigment Network in Lesions of Eruptive Syringoma

Syringoma is a benign adnexal tumor derived from intraepidermal eccrine ducts. The usual presentation of syringoma is a small smooth skin-colored, yellowish or brownish papule with flattened or rounded top. Eruptive syringoma is a rarely reported form, where lesions are numerous and occur in successive crops. A case of a 57-year-old Caucasian male with a twenty four-year history of multiple asymptomatic, erythematous and brownish papules, predominantly over the anterior aspect of the trunk is presented. All lesions appeared after prolonged sun exposures within a few days and persisted without further changes afterwards. Contact non-polarized dermoscopy showed a fine light brown, regular pigment network on a light pink background, being the same in all lesions. History of the disease, clinical finding and dermoscopy were inconclusive, and biopsy was performed. Histopathology revealed signs of syringoma. Dermoscopic finding was thought to be intriguing and therefore is discussed in this paper.