title: Chondroid syringoma.
abstract: We present the case of a 25-year-old man who presented with a slowly enlarging nodule on the upper lip. This nodule first appeared after minor trauma to the area. Our original differential diagnosis included foreign body granuloma, mucocele, inclusion cyst, and adnexal tumor. Histopathology results showed an encapsulated tumor consisting of 2 discrete lobules composed of numerous aggregates of cuboid epithelial cells with tubuloalveolar structures and keratinous cysts within a chondroid stroma-consistent with a chondroid syringoma. We compare and contrast the clinical and histologic characteristics of chondroid syringomas (arising from sweat glands) with those of pleomorphic adenomas (arising from salivary glands).
authors.affiliation: Department of Dermatology, Naval Medical Center, 34800 Bob Wilson Dr, San Diego, CA 92134, USA. eksatter@nmcsd.med.navy.mil
authors.forename: Elizabeth K
authors.initials: EK
authors.lastname: Satter
authors.forename: Bradley S
authors.initials: BS
authors.lastname: Graham
mesh_terms: D008949:Adenoma, Pleomorphic / Q000473:pathology* / Q000601:surgery; D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D012468:Salivary Gland Neoplasms / Q000473:pathology* / Q000601:surgery; D013544:Sweat Gland Neoplasms / Q000473:pathology* / Q000601:surgery