Syringocystadenoma papilliferum (SP) is a benign adnexal tumor.
The SP can take on many morphologies, e.g. papules, nodule, plaques, linear lesion etc. It usually presents at birth or in childhood. The lesions may be moist and fungating. It may occur within a nevus sebaceous.
Malignant transformation to basal cell carcinoma, squamous cell carcinoma, or sweat gland carcinoma is very rare, but has been reported.
Surgical excision or laser ablation may be done.
A very rare case of SP developing in a 51-year-old man. Dermatology Online Journal 19 (3)
A giant linear syringocystadenoma papilliferum of the back. Indian J Dermatol Venereol Leprol 2012;78:123
A 15-year-old girl with a string of linear pink papules on the back of the neck/scalp since early childhood. Dermatology Online Journal 17(8).