Imaging Features of Superficial and Deep Fibromatoses in the Adult Population
Figure 9
Abdominal fibromatosis of the right rectus abdominis muscle: a 35-year-old female with right rectus abdominis fibromatosis. The lesion continued to grow despite discontinuing oral contraceptive pills and taking ibuprofen. (a) Transverse ultrasound image demonstrates a well-defined, heterogeneous hypoechoic mass. (b) Axial T1- (TR148/TE4.6) and T2-weighted (TR441.2/TE100) sequences reveal a heterogeneous lesion (arrows) with T1 signal similar to skeletal muscle and intermediate to high T2 signal. Low-signal bands (arrowhead) are best evaluated on the (c) T2-weighted image. (d) Axial dynamic thrive (TR4.27/TE2.06) postcontrast fat suppression sequence reveals moderate and diffuse enhancement (arrow) of this lesion with high cellularity and scattered nonenhancing foci corresponding to the collagenized bands.
