Imaging Features of Superficial and Deep Fibromatoses in the Adult Population
Figure 7
Extraabdominal fibromatosis of the medial soleus muscle: a 22-year-old female presents with a painless soft tissue mass of the right calf. (a) Coronal T1-weighted (TR550/TE12) and (b) coronal T1-weighted (TR552/TE12) postcontrast fat suppression sequences demonstrate a heterogeneous predominately low T1-weighted signal lesion of the medial soleus muscle (arrow). (c) Coronal T2-weighted (TR3000/TE70) image with fat saturation reveals the lesion growing along the fascia (fascial tail sign) (arrowheads) at the proximal and distal aspects of the lesion. (d) Coronal PET-CT fusion image reveals heterogeneous FDG uptake, which is the most common reported pattern of deep fibromatosis. Note the intermediate T1-weighted signal with marked enhancement corresponding to an area of high cellularity (curved arrows on (a) and (b)) at the proximal aspect of the lesion. This immature area demonstrates higher FDG uptake (curved arrow on (c)).
