PMC6344171_01
Contrast-enhanced computed tomography scan showing a giant mass in the abdominal cavity.
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F1
Contrast-enhanced computed tomography (CT) scan showed a giant, inhomogeneous enhancing, well-defined, soft-tissue density mass possibly arising from the mesocolon and measuring 37 x 25 x 13 cm in the abdominal cavity (Fig. 1).
Photographs of the tumor. (A) Surgical exposure of the tumor; (B) removal of tumor mass; and (C) multiple cut surfaces of the tumor are incanous or isabelline, with minor hemorrhage and necrosis.
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F2
This tumor was removed intact with a segment of the jejunal and transverse colon (Figs. 2A and 2B). The irregular mass weighed 10 kg, and the multiple cut surfaces of this mass were incanus or isabelline, with minor hemorrhage and necrosis (Fig. 2C).
Microscopic examination showing (A) spindle cells surrounded by abundant fibrillar collagen (H&E x200); (B) edema in a certain part of the tumor tissue; (C) minor hemorrhage in the tumor tissue (H&E x100); and (D) tumor tissue involving the muscular layer of the transverse colon wall (H&E x100).
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F3
In addition, this tumor infiltrated the muscular layer of the transverse colon wall (Figs. 3A, 3B, 3C, and 3D).
Immunohistochemistry findings. (A) The cell nucleus is positivity for the beta-catenin antibody (x400); (B) cell cytoplasm is positivity for the vimentin antibody (x400); and (C) tumor cells are negative for CD34 (x400).
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F4
Immunohistochemistry revealed that the tumor cells were positive for beta-catenin, vimentin and negative for CD34, CD117, DOG-1, S-100, and desmin (Fig. 4A, 4B, and 4C).