Histopathology findings: poorly circumscribed lobulated neoplasm with an infiltrative growth pattern. Heterogenous tumor population made up of mononuclear cells, scattered multinucleate (osteoclast-type) giant cells, foamy macrophages and siderophages. Scattered larger mononuclear cells are also identified with a peripheral rim of haemosiderin.
Histology images contributed by Dr L. Mekoa and Dr D. Lakhoo.