case_images: PMC11008341_01
case_images: (a) Endometriosis presenting as an umbilical mass characterized by swelling and discoloration. (b) Abdominal ultrasound showing a non-vascularized subcutaneous mass with a tissue-like appearance at the umbilicus, measuring 24 mm x 19 mm. (c) The computed tomography examination reveals the presence of a tissue-based umbilical nodule that does not extend beyond the muscle layer.
case_images: 10.1177_2050313X241246861-fig1.jpg
case_images: PMC11008341_01_10.1177_2050313X241246861-fig1.jpg
case_images: fig1-2050313X241246861
case_images: On physical examination, we found a 1.5 cm solid black umbilical swelling that was painful and irreducible on palpation, discharging a bloody fluid (Figure 1(a)). Abdominal ultrasound revealed a tissue-like, non-vascularized subcutaneous mass at the umbilicus, measuring 24 mm x 19 mm (Figure 1(b)). Given the unavailability of magnetic resonance imaging, a computed tomography scan of the abdominopelvic region was performed with contrast injection, revealing a small umbilical tissue nodule measuring 23 mm x 19 mm, which did not protrude beyond the muscle plane (Figure 1(c)).
case_images: Histological image showing the endometrial gland (yellow arrow) surrounded by cytogenic stroma (endometriosis); hematoxylin-eosin staining, increase x 100.
case_images: 10.1177_2050313X241246861-fig2.jpg
case_images: PMC11008341_01_10.1177_2050313X241246861-fig2.jpg
case_images: fig2-2050313X241246861
case_images: The diagnosis of umbilical endometriosis was confirmed through histological examination (Figure 2).