title: Pigmented squamous cell carcinoma of the alveolar ridge in the oral mucosa.
abstract: The clinical and morphologic features of a pigmented squamous cell carcinoma of the alveolar ridge in an 81-year-old Japanese woman are reported. The tumor was typical, well-differentiated squamous cell carcinoma but had many melanin-containing cells within it. Electron microscopy showed melanosomes in macrophages, melanocytes, and neoplastic squamous cells. Those in the neoplastic squamous cells seemed to have been excreted from the cytoplasmic processes of melanocytes.
authors.affiliation: Department of Pathology, Kagawa Medical School, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kuwabara
authors.forename: H
authors.initials: H
authors.lastname: Uda
authors.forename: M
authors.initials: M
authors.lastname: Miyaguchi
authors.forename: M
authors.initials: M
authors.lastname: Nagai
authors.forename: K
authors.initials: K
authors.lastname: Saito
authors.forename: T
authors.initials: T
authors.lastname: Shibanushi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000539:Alveolar Process / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000473:pathology* / Q000648:ultrastructure; D005260:Female; D006801:Humans; D008441:Maxillary Neoplasms / Q000473:pathology* / Q000648:ultrastructure; D008543:Melanins / Q000032:analysis; D008544:Melanocytes / Q000648:ultrastructure*; D009061:Mouth Mucosa / Q000473:pathology* / Q000648:ultrastructure
chemical_list: D008543:Melanins