July 15, 2020

A 65-year-old man presented with 4-month history of a rapidly growing, indurated, ulcerated, 2.5 cm tumor of the left parietal scalp. Subtotal biopsy showed a spindle cell neoplasm with features of atypical fibroxanthoma (AFX) but the neoplasm invaded deep subcutaneous tissue. Which one is the best diagnostic term for this malignant tumor?

  • Atypical fibroxanthoma (AFX)
  • Pleomorphic dermal sarcoma (PDS)
  • Superficial malignant fibrous histiocytoma (MFH)
  • Undifferentiated pleomorphic sarcoma (UPS)
  • None of the above