Pathology: haemosiderotic fibrolipomatous tumour

Haemosiderotic fibrolipomatous tumour

  • Spindle-epithelioid cells in fascicles

  • Amphophilic cytoplasm with frequent intracytoplasmic haemosiderin

  • Ovoid hyperchromatic nuclei with small nucleoli; inconspicuous mitotic activity

  • Admixed mature adipocytes; abundant siderophages and occasional osteoclast-type multinucleated giant cells

  • IHC: CD34