Imaging Features of Superficial and Deep Fibromatoses in the Adult Population
Figure 6
Extraabdominal fibromatosis of the right forearm with osseous involvement: a 47-year-old female with recurrent right distal forearm desmoid. (a) AP radiograph and (b) coronal T1-weighted (TR452/TE6.24) fat saturation (FS) postcontrast image demonstrate a distal forearm soft tissue mass (arrows) with involvement of the distal radius and ulna. Note the soft tissue density (arrowheads) on the radiograph. Axial (c) T1-weighted (TR428/TE9.5), (d) T2FS (TR3263/TE68.3), and (e) T1FS postcontrast sequences reveal a volar soft tissue mass deep to the flexor tendons with deep invasion and marrow replacement of the distal radius (arrows) and ulna. Low-signal, predominantly collagenous component (curved arrow) is best appreciated on the T2 fat suppression image. Photomicrographs (f) low- and (g) high-power hematoxylin-eosin (H-E) stain reveal spindled or stellate cells with bland nuclear features in a background of thick collagenous bands.
