title: Asymptomatic nodule on the upper lip.
authors.affiliation: Institute of Dermatological Sciences-Istituto di Ricovero e Cura a Carattere Scientifico, Ospedale Maggiore, Milan, Italy.
authors.forename: Ruggero
authors.initials: R
authors.lastname: Caputo
authors.forename: Angelo V
authors.initials: AV
authors.lastname: Marzano
authors.forename: Raffaele
authors.initials: R
authors.lastname: Gianotti
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D015616:Histiocytosis, Non-Langerhans-Cell / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D008048:Lip Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D008297:Male