case_images: PMC8476878_01
case_images: A solid, poorly vascularized mass, measuring 83 x63 x36 mm, with thin septa, is apparent in the rectus muscle of the abdomen in the suprapubic area (arrow).
case_images: fsurg-08-735381-g0001.jpg
case_images: PMC8476878_01_fsurg-08-735381-g0001.jpg
case_images: F1
case_images: Computed tomography (CT) revealed evidence of a solid, poorly vascularized, partially cystic neoformation, with thin septa, localized in the left lower rectus muscle, with no other noteworthy findings (Figure 1).
case_images: Histological images of the tumor. Carcinoma with papillary and tubule-cystic architecture. The cells exhibit clear and eosinophilic cytoplasm and hyperchromatic nuclei with mild to moderate atypia (arrow) (A; H&E, 5x). Dilated cysts lined by flattened cells with benign-appearing nuclei intermixed with atypical papillae (arrow) (B; H&E, 10x). Occasional small groups of clear cells (arrow) (C; H&E, 10x). Irregular infiltrating glands with dense fibrous stroma (arrow) (D; H&E, 10x).
case_images: fsurg-08-735381-g0002.jpg
case_images: PMC8476878_01_fsurg-08-735381-g0002.jpg
case_images: F2
case_images: The cells exhibited clear and eosinophilic cytoplasm and hyperchromatic nuclei with mild to moderate atypia (Figure 2A). Moreover, intermixed with atypical papillae, dilated cysts lined by flattened cells with benign-appearing nuclei were observed (Figure 2B). Occasional small groups of clear cells were observed (Figure 2C). No foci of benign endometrial glands were found; however, dense fibrous tissue and hemorrhagic areas were present mainly in the peripheral area of the lesion (Figure 2D).
case_images: Immunohistochemical profile: diffuse expression of ARID1A (A, 20x), CK7 (B; 20x); napsin-A (C, 20x), and PAX8 (D; 20x).
case_images: fsurg-08-735381-g0003.jpg
case_images: PMC8476878_01_fsurg-08-735381-g0003.jpg
case_images: F3
case_images: Immunohistochemical analysis revealed expression of CK7, PAX8, napsin-A, ARID1A, and membranous beta-catenin (Figure 3) in neoplastic cells, and negativity for ER, PR, CA125, CDX2, TTF1 and calretinin.