MRI features of aggressive fibromatosis

Objective To investigate the appearances of aggressive fibromatosis on MRI.Methods MRI findings of 11 patients with pathology proved aggressive fibromatosis were analyzed retrospectively.Results The masses were intraabdominal or in abdominal wall.The masses were expanded and round or round-like or infiltrative and irregular.11 cases were found slightly high signal on T2WI,isosignal in 6 cases,slightly low signal in 3 cases,slightly high signal in 2 cases on T1WI on MRI imaging,and were high signal on fat inhibition imaging,the edges and borders of masses were clear,low signal on all pulse sequences were seen in 4 cases.Enhancement was light and moderate on arterial and venous stage,intense enhancement uniformly on delayed stage.Some area had no enhancement in 4 cases.Conclusion The appearances of aggressive fibromatosis on MRI were relatively specific.MRI can be a valuable tool for the diagnosis on aggressive fibromatosis.