Syringocystadenoma Papilliferum
Syringocystadenoma Papilliferum Key Points Syringocystadenoma papilliferum (SCAP) is a benign adnexal skin tumor presenting as a proliferating lesion of apocrine, eccrine, or pluripotential appendageal cells, mostly located on the head…
Stevens-Johnson Syndrome
Stevens-Johnson Syndrome Key Points Stevens-Johnson syndrome (SJS) is a severe T-cell-mediated, usually drug-induced, acute blistering disease of the skin SJS, together with toxic epidermal necrolysis, represents a wide spectrum of…
Subepidermal Calcinosis
Subepidermal Calcinosis Key Points Subepidermal calcinosis is a form of localized cutaneous soft tissue calcium deposit It is classified as dystrophic, metastatic, calciphylaxis, iatrogenic, and idiopathic types The pathogenesis is…
Solitary Fibrous Tumor
Solitary Fibrous Tumor Key Points Solitary fibrous tumor (SFT), previously known as hemangiopericytoma, comprises a histologic spectrum of fibroblastic mesenchymal neoplasms The SFT group includes SFT and related lesions ranging…
Seborrheic Keratosis
Seborrheic Keratosis Key Points Seborrheic keratosis (SK) is the most common benign epithelial tumor and accounts for about 20% of benign epithelial neoplasms seen on the eyelid The pathogenesis of…
Sebaceous Duct Cyst
Sebaceous Duct Cyst Key Points Sebaceous duct cysts are sporadic, superficial cutaneous cysts caused by obstruction of the outflow duct of the sebaceous glands associated with the pilosebaceous follicular unit…
Sebaceous Adenoma
Sebaceous Adenoma Key Points Sebaceous adenoma is very rare tumor often associated with Muir Torre syndrome (MTS), a rare cancer predisposition disorder The cutaneous tumors associated with MTS include primarily…
Sarcoidosis
Sarcoidosis Key Points Sarcoidosis is a multisystem inflammatory disease of unknown etiology characterized by noncaseating granulomas in the involved organs The most common manifestation is pulmonary involvement, but extrapulmonary manifestations…
