case_images: PMC11757161_01
case_images: (a) Abdominal contrast-enhanced scan in the arterial phase shows the tumour compressing the portal vein, common hepatic artery, and celiac trunk. (b) T2-weighted MRI image shows the tumour with high signal intensity and no solid components.
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case_images: The mass was compressing surrounding structures, including the portal vein, common hepatic artery, and coeliac trunk (Fig. 1a and b).
case_images: (a) Intraoperative view shows the tumour extending beyond the right side of the duodenal ligament. (b) Laparoscopic dissection of the tumour from the portal vein.
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case_images: Intraoperatively, a large cystic mass was found protruding from the omental bursa, with additional cysts observed on the right side of the hepatoduodenal ligament, indicating a retroperitoneal origin (Fig. 2a and b).
case_images: (a) The tumour is completely excised. (b) The tumour is cut open, revealing milky white fluid and a small amount of fatty tissue.
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case_images: The cyst wall was carefully dissected and separated from surrounding structures, including the common hepatic artery, left gastric artery, the superior border of the pancreas, and the portal vein, enabling complete excision (Fig. 3a). Macroscopically, the tumour appeared as a fatty cystic mass measuring 18.5 x 8 x 4 cm, with a multi-locular, honeycomb-like appearance containing milky white fluid (Fig. 3b).
case_images: (a) Immunohistochemistry D2-40 (+). (b) Haematoxylin and eosin staining.
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case_images: Immunohistochemistry results were positive for D2-40 and CD31, confirming the lymphatic nature of the tumour (Fig. 4a and b).