PMC9076334_01
Findings on initial examination. A palpable subcutaneous mass is seen at the position surrounded by the red dashed line.
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The mass was partially adherent to the overlying skin and firmly adherent to the underlying rectus abdominis, and there was no skin redness or heat (Figure 1).
Preoperative MR images. (a) T1-weighted image. (b) T2-weighted image. A hypointense mass is observed within the rectus abdominis, as indicated by the yellow arrow. MR, magnetic resonance.
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MRI showed a substantial mass in the lower portion of the rectus abdominis, with slightly irregular borders and hypointensity on T1WI and T2WI (Figure 2).
Intraoperative findings. (a) Preoperative design. (b) After tumor resection. (c) Abdominal wall reconstruction using a mesh. (d) Wound closure. (e) Removed specimen.
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In addition, the posterior sheath of the rectus abdominis was partially resected, and the abdominal wall was reconstructed by implanting a soft artificial mesh (Figure 3).
Pathologic observations. Endometrial tissue, hemosiderin, phagocytic histiocytes, and granulation tissue are observed. Bar = 500 mum.
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Histopathological examination of the excised specimen revealed endometrial tissue, hemosiderin, phagocytic histiocytes, and granulation tissue; hence, the patient was diagnosed with endometriosis (Figure 4).