Benign fibrohistiocytic tumors

 fibrous papule
 fibrous histiocytoma

• deep fibrous histiocytoma
• cutaneous fibrous histiocytoma (dermatofibroma)
  • epithelioid dermatofibroma

 oral fibroma
 digital fibroma
 dermatomyofibroma
 juvenile xanthogranuloma
 reticulohistiocytoma
 xanthoma
 giant cell tumor of tendon sheath (nodular synovitis)
 diffuse-type giant cell tumors
 xanthomatous fibrous histiocytoma (inflammatory type)

Intermediate fibrohistiocytic tumors

 atypical fibroxanthoma
 dermatofibrosarcoma protuberans (including pigmented form Bednar tumor)
 giant cell fibroblastoma
 plexiform fibrohistiocytic tumor (see also myofibroblastic tumors)
 angiomatoid fibrous histiocytoma
 plexiform fibrous histiocytoma
 soft tissue giant cell tumor (of low malignant potential)

Malignant fibrohistiocytic tumors

 malignant fibrous histiocytoma
 storiform malignant fibrous histiocytoma
 pleomorphic malignant fibrous histiocytoma
 myxoid fibrous histiocytoma
 giant cell fibrous histiocytoma (malignant giant cell tumor of soft parts)

References

 Billings SD, Folpe AL. Cutaneous and subcutaneous fibrohistiocytic tumors of intermediate malignancy: an update. Am J Dermatopathol. 2004 Apr;26(2):141-55. PMID: #15024197#