title: Dermatology clinics: what's new in dermatopathology: news in nonmelanocytic neoplasia.
abstract: This article reviews the recent dermatopathology literature involving nonmelanocytic neoplasia, with a focus on important work done over the last 5 years. The discussion includes advances in the understanding of Merkel cell carcinoma pathogenesis and prognosis; changes in the seventh edition of the American Joint Committee of Cancer staging manual in reference to staging of squamous cell carcinoma and Merkel cell carcinoma; newly described or rare histopathologic patterns and entities including squamoid eccrine ductal carcinoma, rippled-pattern adnexal neoplasms, onychomatricoma, spindle cell predominant trichodiscoma/neurofollicular hamartoma, and myoepithelioma; and microsatellite instability in sebaceous neoplasms of Muir-Torre syndrome and other tumors.
authors.affiliation: Department of Pathology, Mount Sinai School of Medicine, One Gustave L Levy Place, New York, NY 10029, USA.
authors.forename: Harleen K
authors.initials: HK
authors.lastname: Sidhu
authors.forename: Rita V
authors.initials: RV
authors.lastname: Patel
authors.forename: Gary
authors.initials: G
authors.lastname: Goldenberg
mesh_terms: D049309:Acanthoma / Q000150:complications / Q000473:pathology; D018266:Adenocarcinoma, Sebaceous / Q000473:pathology; D000236:Adenoma / Q000473:pathology; D015266:Carcinoma, Merkel Cell / Q000473:pathology* / Q000821:virology; D002294:Carcinoma, Squamous Cell / Q000473:pathology* / Q000821:virology; D006222:Hamartoma / Q000473:pathology; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology; D059965:Merkel cell polyomavirus; D055653:Muir-Torre Syndrome / Q000150:complications; D009208:Myoepithelioma / Q000473:pathology; D009367:Neoplasm Staging; D027601:Polyomavirus Infections / Q000473:pathology; D012626:Sebaceous Gland Neoplasms / Q000150:complications / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology* / Q000821:virology*; D013544:Sweat Gland Neoplasms / Q000473:pathology; D014412:Tumor Virus Infections / Q000473:pathology