Imaging Features of Superficial and Deep Fibromatoses in the Adult Population
Figure 5
Extraabdominal fibromatosis of the left brachial plexus: a 64-year-old female presented with left shoulder and upper arm pain. The lesion was not amenable to surgical resection because of the intimate relationship with neurovascular structures of the left brachial plexus. (a) Coronal T2-weighted (TR4130/TE30) fat saturation and (b) coronal T1-weighted (TR576/TE11) postcontrast fat suppression sequences reveal a heterogeneous intermediate-to-high signal lesion with moderate and diffuse enhancement (arrows). Note the low-intensity band (arrowheads) corresponding to an acellular, collagen rich area interspersed between the highly vascularized fascicles of spindle cells. (c) Coronal T1-weighted (TR560/TE11) image obtained at presentation is compared to (d) coronal T1-weighted (TR572/TE14) and (e) STIR (TR5560/TE34) images obtained two years and four months after the previous images and status after completing radiotherapy (50.4 gray in 28 fractions). The lesion (arrows) reveals decrease in size and lower T1 and STIR signal indicating mature collagenized tissue after treatment.
