Table 1.

Pathologic T stages and MDCT criteria for T stages of GC (compiled from Moschetta et al.^[26] and Kim et al.^[49])

Pathologic T stage	MDCT criteria
pT1: tumor invades the lamina propria, muscularis mucosae or submucosa	T1: strong enhancement with focal thickening in the inner and/or middle layer, but the outer layer shows no enhancement; enhancement of the stomach wall only but the wall is not thickened; wall thickening with intense enhancement of the inner layer and the presence of a hypodense stripe/layer
pT2: tumor invasion into the muscularis propria	T2–3: the entire stomach wall thickness is thickened to variable extent but there is a regular surface of outer layer of gastric wall; normal appearance of perigastric fat
pT3: tumor invades the subserosa
pT4a: tumor perforates the serosa	T4a: the entire stomach wall is thickened with homogeneous or inhomogeneous enhancement; irregular surface of the outer layer of the gastric wall; presence of micronodules or dense stranding in the perigastric fat
pT4b: tumor invades adjacent structures	There is extension of the tumor into adjacent contiguous organs in addition to wall thickening