title: What is your diagnosis? Periungual squamous cell carcinoma.
authors.affiliation: Department of Dermatology, Geisinger Medical Center, Danville, Pennsylvania, USA.
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Elston
authors.forename: Mary
authors.initials: M
authors.lastname: Farley
authors.forename: John
authors.initials: J
authors.lastname: Albertini
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000532:radiotherapy / Q000556:secondary / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008207:Lymphatic Metastasis; D015580:Mohs Surgery; D009262:Nails / Q000473:pathology*; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000532:radiotherapy / Q000601:surgery