title: Malignant fibrous xanthoma of the lip.
abstract: Malignant fibroxanthoma is a most unusual tumor, especially when arising in the head and neck region. A patient with such a tumor arising in the lower lip is presented. This case was characterized by local recurrences, as well as regional and distant metastases. The differentiation between atypical fibroxanthoma and malignant fibroxanthoma is discussed.
mesh_terms: D000328:Adult; D005354:Fibrosarcoma / Q000473:pathology* / Q000556:secondary; D006801:Humans; D008048:Lip Neoplasms / Q000473:pathology*; D008175:Lung Neoplasms / Q000556:secondary; D008297:Male; D008339:Mandibular Neoplasms / Q000556:secondary; D009364:Neoplasm Recurrence, Local