title: A rapidly growing crusted nodule on the lip.
authors.affiliation: Department of Dermatopathology, Buffalo Medical Group, 6225 Sheridan Drive, Suite 208, Building B, Williamsville, NY 14221, USA.
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Wirth
authors.forename: Thomas N
authors.initials: TN
authors.lastname: Helm
mesh_terms: D000368:Aged; D015266:Carcinoma, Merkel Cell / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D003881:Dermatomycoses / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D008048:Lip Neoplasms / Q000473:pathology*; D008297:Male; D008545:Melanoma / Q000473:pathology; D009463:Neuroma / Q000473:pathology