case_images: PMC9916474_01
case_images: T1-weighted axial image (a), T2-weighted sagittal (b), and axial (d) images showed a hypointense lesion in the right rectus abdominis muscle (arrow). On the axial STIR sequence (c), which was at the same level of the image (a) a high internal punctate signal intensity became more conspicuous (arrowhead).. STIR: short T1 inversion recovery.
case_images: cureus-0015-00000033662-i01.jpg
case_images: PMC9916474_01_cureus-0015-00000033662-i01.jpg
case_images: FIG1
case_images: T1 and T2 weighted images suggestive of fibrosis. There was a high internal punctate signal intensity within the lesion seen on both T1 and T2-weighted images and became more significant on fat-suppressed images (Figure 1).
case_images: Postoperative specimen of the excised endometrial tissue from the rectus abdominis muscle.
case_images: cureus-0015-00000033662-i02.jpg
case_images: PMC9916474_01_cureus-0015-00000033662-i02.jpg
case_images: FIG2
case_images: The aponeurosis defect was repaired tension-freely primarily using sutures no: 1 polyglactin (Figure 2).
case_images: A histological aspect of endometrial gland structures and endometrial stroma included within the muscle fibers (H&E stain, 40x magnification).
case_images: cureus-0015-00000033662-i03.jpg
case_images: PMC9916474_01_cureus-0015-00000033662-i03.jpg
case_images: FIG3
case_images: Inactive endometrial gland structures and endometrial stroma with hemosiderin-laden macrophages in the lumen of various sizes scattered randomly between muscle bundles were observed microscopically, consistent with the diagnosis of endometriosis of the rectus abdominis muscle (Figures 3-5).
case_images: A histological aspect of endometrial gland structures and endometrial stroma included within the muscle fibers (H&E stain, 100x magnification).
case_images: cureus-0015-00000033662-i04.jpg
case_images: PMC9916474_01_cureus-0015-00000033662-i04.jpg
case_images: FIG4
case_images: Inactive endometrial gland structures and endometrial stroma with hemosiderin-laden macrophages in the lumen of various sizes scattered randomly between muscle bundles were observed microscopically, consistent with the diagnosis of endometriosis of the rectus abdominis muscle (Figures 3-5).
case_images: Ectopic endometrial tissue showing foci of hemorrhage with hemosiderin-laden histiocytes.
case_images: cureus-0015-00000033662-i05.jpg
case_images: PMC9916474_01_cureus-0015-00000033662-i05.jpg
case_images: FIG5
case_images: Inactive endometrial gland structures and endometrial stroma with hemosiderin-laden macrophages in the lumen of various sizes scattered randomly between muscle bundles were observed microscopically, consistent with the diagnosis of endometriosis of the rectus abdominis muscle (Figures 3-5).