MRI OF MALIGNANT FIBROUS HISTIOCYTOMA OF SOFT-TISSUE - ANALYSIS OF 13CASES WITH PATHOLOGICAL CORRELATION

We reviewed the magnetic resonance (MR) appearances of 13 malignant fi brous histiocytomas (MFH) of soft tissue and correlated each with the respective lesion's histopathology. The MR images were evaluated for s ignal intensity on T1- and T2-weighted spin echo sequences, homogeneit y of the lesion, presence of internal low signal septations, and margi n definition. Histologic subtypes of MFH included storiform-pleomorphi c, giant cell, myxoid, and inflammatory. We could not establish a corr elation between MR appearance and histopathology. Instead, our series exhibited general features suggestive of malignant soft tissue neoplas ms, namely poor margin definition, internal low signal septation, and heterogeneous high signal intensity on T2-weighted images.