Sections show a well-circumscribed dermal cyst lined by stratified squamous epithelium with a distinct granular layer. The cystic cavity is filled with lamellated keratin. The surrounding stroma and overlying epithelium are unremarkable, with no evidence of atypia, inflammation, or malignancy.
Back cyst, ? sebaceous cyst.
Partially covered soft tissue piece measured 1.5x1x1 cm, totally embedded.
Back cyst, Excision Biopsy: