MR findings indicative of hemosiderin in giant-cell tumor of bone: frequency, cause, and diagnostic significance.

Abstract

Hemosiderin is commonly seen on MR images of giant-cell tumors of bone (63%) and is probably related to the extravasated erythrocytes in the tumor and the phagocytic function of the tumor cells. This MR finding supports the diagnosis, even in giant-cell tumors in uncommon locations or in patients who are not in the typical age range.