Syringocystadenoma papilliferum in a 20-year-old adult: a case report and literature review.

Syringocystadenoma papilliferum is a rare, benign hamartomatous neoplasm of skin adnexal originating from pluripotent cells differentiating into either apocrine or eccrine sweat glands. It usually appears at birth, during infancy or puberty and commonly located at head and neck. This case report illustrates a rare occurrence at an atypical anatomical location and unusual onset. In this case report, we report a 20-year-old female with a chief complain of solitary pink-brown color fleshy plaque with soft-medium consistency on her left flank region since the last 7 months. She underwent complete surgical excision and histopathology examination, which confirmed the diagnosis as syringocystadenoma papilliferum without sign of malignancy, with main characteristics histologically include cystic invaginations from the epidermis lined by double layers of epithelial and myoepithelial cells. Despite having benign characteristics, rare transformations to malignancy have been reported. Therefore, complete surgical excision and histopathology examination should be done in suspicion of syringocystadenoma papilliferum.