[Clinical application value of MRI on malignant fibrous histiocytoma in soft tissue]

To investigate imaging manifestation and clinical application of MRI on malignant fibrous histiocytoma (MFH) in soft tissue.

Imaging and pathological data of 16 patients with malignant fibrous histiocytoma (MFH) in soft tissue confirmed by surgery and pathology were retrospectively analyzed from January 2009 to August 2016. There were 9 males and 7 females, aged from 34 to 67 years old with an average of 52 years. The courses of disease ranged from 5 to 48 months with an average of 27 months.The main clinical manifestations were soft tissue mass and local pain. All patients were underwent plain and enhanced MRI before operation. Pathogenic sites, MRI manifestation and pathology results were observed after operation.

MRI in 16 cases of T1WI showde slightly lower signal or equal signals, of which 6 cases of tumor see mixed signal; in T2WI were high signal, of which 7 cases of internal tumor can be seen low signal separation, 5 cases of turor can be seen flase envelope, 11 cases of tumor with the surrounding boundaries unclear with edema. All lesions showed significantly uneven enhancement. Immunohistochemical examination showed that Vim, CD68 was positive.

Although MRI features of MFH has certain characteristics, the qualitative was more difficult, and ultimately need to determine the pathological and immunohistochemical. But MRI examination has obvious advantages in clarifying range of tumor, invading peripheral blood vessels and nerves, and has important clinical application value for clinical operation plan and postoperative tumor residual and recurrence, and provid reference for clinical curative effect.