Figure 12c.

Endometriosis in the abdominal wall of a 43-year-old woman with worsening pain in the right lower quadrant that had begun 4 months after laparoscopic hysterectomy for menorrhagia. (a) Axial contrast-enhanced CT image shows a heterogeneously enhancing mass (arrow) in the right lateral abdominal wall musculature, adjacent to the anterior iliac wing. (b, c) T1-weighted (b) and T2-weighted (c) MR images show heterogeneous signal intensity within the multiloculated mass, with increased T1 and T2 signal intensity in a lateral loculated component (arrow). (d, e) T1-weighted fat-suppressed MR images obtained before (d) and after (e) the administration of gadolinium-based contrast material better show the intrinsic T1 hyperintensity (arrow on d) and heterogeneous enhancement (arrow on e).