Figure 5:
A: Macroscopically, the anastomosis around the ascending colon, which
was the primary site, revealed a circumferential 84×52 mm type 3 tumor
with superficial necrotic tissue. The necrotic tissue adhered to the
superficial layer.
B: The tumor was a grayish-white, dense tumor seated in the intrinsic
muscularis propria, with atypical spindle-shaped cells in the tumor
area, infiltrating into the subplasma membrane and showing atypical
nuclear fission. The serosa layer of the colon was filled with fibrous
hyperplasia, vessel hyperplasia, inflammatory cell infiltration, and
necrotic tissues. The serosa layer of the colon was filled with fibrous
hyperplasia, vessel hyperplasia, inflammatory cell infiltration, and
necrotic tissues.
The dotted line is the anastomosis.
C and D: Further immunohistochemical analysis showed that the tumor
cells were positively stained for α1-antichymotrypsin (Fig. 5C) and
vimentin (Fig. 5D).