title: A slowly enlarging umbilical nodule--quiz case. Diagnosis: Verrucous carcinoma.
authors.affiliation: University of Louisville, Louisville, KY, USA.
authors.forename: Julie E
authors.initials: JE
authors.lastname: Dixon
authors.forename: Janine C
authors.initials: JC
authors.lastname: Malone
mesh_terms: D001707:Biopsy, Needle; D018289:Carcinoma, Verrucous / Q000473:pathology* / Q000601:surgery*; D018450:Disease Progression; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D035583:Rare Diseases; D018570:Risk Assessment; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery*; D016896:Treatment Outcome; D014472:Umbilicus / Q000473:pathology*