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osteoma medullare

An osteoma containing spaces that are filled (or partly filled) with various elements of bone marrow.

osteoid osteoma, a painful benign neoplasm that usually originates in one of the bones of the lower extremities, especially the femur or tibia of adolescent and young adult persons; characterised by a nidus (usually no larger than 1 cm in diameter) that consists of osteoid material, vascularised osteogenic stroma, and poorly formed bone; around the nidus there is a relatively large zone of reactive thickening of the cortex.

osteoma spongiosum, an osteoma that consists chiefly of cancellous bone tissue.