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Pathologic and MR imaging features of benign fibrous soft-tissue tumors in adults Dinauer PA; Brixey CJ; Moncur JT; Fanburg-Smith JC; Murphey MDRadiographics 2007[Jan]; 27 (1): 173-87Benign fibrous (fibroblastic or myofibroblastic) soft-tissue tumors are a heterogeneous group of fibrous lesions with widely varied anatomic locations, biologic behavior, and pathologic features. The four broad categories of fibrous proliferation are benign fibrous proliferations, fibromatoses, fibrosarcomas, and fibrous proliferations of infancy and childhood. The first two categories include nonaggressive fibroblastic lesions such as nodular fasciitis, as well as fibromatoses that demonstrate more aggressive biologic behavior (eg, desmoid tumors). In adults, fibrous tumors are among the most common soft-tissue lesions encountered in clinical practice. MR imaging can be useful for defining the intrinsic signal characteristics, size, and compartmental extension of these lesions. Histologic features of the tumor also may be depicted on T2-weighted MR images. Hypocellular fibrous tumors with dense collagenous components tend to have lower signal intensity on T2-weighted images than do lesions that are more cellular or that contain greater amounts of extracellular myxoid matrix. When interpreting MR images of soft-tissue masses in adults, radiologists should be aware of the clinical behavior, common sites of occurrence, and histopathologic and imaging features of the common benign fibrous soft-tissue tumors.|Adult[MESH]|Biopsy[MESH]|Diagnosis, Differential[MESH]|Humans[MESH]|Image Enhancement/*methods[MESH]|Magnetic Resonance Imaging/*methods[MESH]|Neoplasms, Fibrous Tissue/*pathology[MESH]|Practice Guidelines as Topic[MESH]|Practice Patterns, Physicians'[MESH]|Soft Tissue Neoplasms/*pathology[MESH] |
