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Abstract
Purpose: to investigate the role MRI using conventional and DWI sequences in the evaluation of pathologically proven soft tissue fibromatoses. Results: Soft tissue fibromatoses commonly present as locally infiltrative ill- or partly-defined soft tissue mass lesions showing variable MR signal intensity with the predominantly intermediate intensity on both T1 and T2WIs with low signal areas interspersed within the lesion being the most common pattern. Most lesions show heterogeneous moderate to marked contrast uptake with the post-contrast sequences using fat suppression techniques being the most accurate in studying the local extensions of the lesions. MR imaging is useful for monitoring the effect of drug or radiation therapy in these lesions. These lesions show predominantly high and intermediate signal intensities on the DWIs and the ADC map respectively with their mean and minimum ADC values being 1.41 ± 0.26 {u00D7} 10-3 and 0.79 ± 0.43 {u00D7} 10-3 mm2/sec respectively. In lesions treated with chemo- or radiotherapy, a good response to therapy was associated with a relatively lower mean and minimum ADC values, as compared to lesions with poor therapeutic response.