PMC7642373_01
(A) Abdominal radiograph showing a huge oval radiopaque lesion on the left side. There was no dilated bowel visualized. (B) Contrast-enhanced computed tomography (CT) of the abdomen at axial phase showing a large well-defined homogenous lesion. (C) The homogenous lesion visualized at the coronal section.
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F1
The abdominal radiograph showed a huge radiopaque lesion over the left abdomen (Figure 1A). Computed tomography (CT) scan was done showing left adnexal mass with a possibility of ovarian serous cystadenoma measuring 14.5 x 14.6 x 18.2 cm with local mass effect to the ureter causing mild left hydronephrosis (Figures 1B,C).
(A) Intraoperative picture showing a huge rounded mass with a smooth surface. There is a tubular structure likely to be the left ureter (arrow) running superficially on the mass. (B) Gross specimen after tumor excision showing an intact, well-encapsulated rounded lesion with preserved left ureter (previous ureter tract as shown) (arrow).
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F2
Intraoperatively, there was a huge mass arising from the retroperitoneal space attaching to the psoas muscle, spine, and also encasing the internal iliac and left ureter (Figures 2A,B).
(A) Microscopic picture revealed sections of the cystic wall showing fibrous stroma, devoid of any epithelial lining (The outer surface of the cyst was inked black) (arrow). (B) Higher magnification of the cyst wall showing fibrous tissue with very mild scattered lymphocytes infiltrates.
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F3
The histopathological assessment finding was consistent with a benign retroperitoneal cyst (Figures 3A,B).