PMC9470830_01
(A,B) Abdominal coronal and horizontal CT. (C) Postoperative surgical drawing. (D,E) Operative photos. (F) Gross examination revealed an encapsulated elliptic mass (17.0 cm x 13.1 cm x 10.7 cm). MCA, middle colic artery; AO, aorta abdominalis; IMA, inferior mesenteric artery; RBV, reproductive blood vessels.
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F1
Meanwhile, abdominal CT (Figures 1A,B) revealed that a vast space-occupying lesion was located in her left middle and upper abdomen and its blood supply mainly came from the inferior mesenteric artery (IMA). During the operation, we found that peritoneal giant mass with a volume of 17.0 cm x 13.1 cm x 10.7 cm was closely related to the peripheral blood vessels and organs (Figure 1C). Especially, the tumor had a common blood supply to the left half colon (Figures 1C,E). Together with the left hemicolon, the mass was separated carefully and removed entirely from the surrounding tissue (Figure 1F).
Pathology and immunohistochemistry showed HE staining of the tumor tissue (HE, 100x and 200x), CD56 (+), CgA (+), Syn (+), and Ki-67 index was 15%.
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F2
Immunohistochemistry showed CD56 (+), CgA (+), Syn (+), CK (-), CD34 (+), SMA (-), CD10 (-), EMA (-), HMB45 (-), Inhibin-alpha (-), MelanA (-), NF (-), S-100 (-), and the Ki-67 index was 15% (Figure 2).
Abdominal CT comparison. (A/a) postoperative CT at five months; (B/b) preoperative CT (arrow refers to the tumor).
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F3
Meanwhile, there were no signs of recurrence through CT evaluation (Figure 3).