title: Keratoacanthoma or verrucous carcinoma? A case report.
abstract: A 75-year-old woman presented with a slow growing lesion on the plantar surface of her right foot, which had changed in appearance over several months. The patient underwent excision of the suspicious lesion, and a provisional diagnosis of keratoacanthoma was given. However, approximately three months later, the lesion grew to its original size. Subsequent re-evaluation and consultation resulted in changing of the diagnosis to verrucous squamous cell carcinoma. The patient underwent a wider excision with split thickness skin grafting. The authors discuss this rare pedal entity and the inherent difficulty in both its clinical and microscopic differentiation.
authors.affiliation: Department of Surgery, Mt. Sinai Medical Center, Cleveland, Ohio 44106.
authors.forename: A E
authors.initials: AE
authors.lastname: Kallibjian
authors.forename: J N
authors.initials: JN
authors.lastname: Choos
mesh_terms: D000368:Aged; D018289:Carcinoma, Verrucous / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D003937:Diagnosis, Differential; D005260:Female; D005528:Foot; D006801:Humans; D007636:Keratoacanthoma / Q000175:diagnosis*; D009364:Neoplasm Recurrence, Local; D012878:Skin Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D016038:Skin Transplantation