T stage

Stomach wall

Fatty tissue infiltration

Invasion into adjacent organs

Contrast enhancement

T1

Local thickening of internal wall >5 mm, external layer is intact and is visualized as a strip of lower density. Tumor infiltrates mucosa or submucal layer.

Adjacent fatty tissue is well differentiated, no infiltration is observed.

None

Contrast enhancement is more intensive than in other parts of stomach mucosa.

T2

Tumor is observed as local or diffuse thickening of the wall, involving transmural layer. External layer is intact. Tumor infiltrates muscular and subserosal layers.

Adjacent fatty tissue is well differentiated, no infiltration is observed.

None

Contrast enhancement is more intensive than in other parts of stomach mucosa.

T3

Transmural tumor with uneven or nodulated involved external layer of the stomach. Tumor infiltrates serosal layer.

The differentiation of tumor-adjacent fatty tissue is poor.

None

T4

Wide tumor infiltration. Tumor infiltrates adjacent structures.

No differentiation of adjacent fatty tissue. It is infiltrated.

Present