Microscopical examination shows abundant thin-walled blood vessels with hypocellular and hypercellular areas. Immunohistochemistry Almost all tumor cells have immunoreactivity for both desmin and vimentin. It also express estrogen receptors and/or progesterone receptors, but staining for cytokeratin is negative.
Angiomyofibroblastoma
Cellular angiofibroma
Littoral cell angioma
Ameloblastic fibroma
Sclerosing epithelioid fibrosarcoma
Mycetoma
Giant-cell fibroblastoma
Eumycetoma