Table 2. CT structure report of colon cancer.

Name　　　　　　　　　 Sex　　　　　　　 Age　　　　　　Image number　　　　　　　Date of examination Inspection item　　　　　Colon CT　　　　　Clinical diagnosis
CT, computed tomography; RSM, retroperitoneal surgical margin; EVMI, extramural vascular invasion.
Tumor location
Left colon	[　]		Right colon	[　]
Cecum	[　]
Ascending colon	[　]
Hepatic flexure of colon	[　]
Transverse colon	[　]
Splenic flexure of colon	[　]
Descending colon	[　]
Sigmoid colon	[　]
Size measurement
Mass type		Size of mass: _____ mm × _____ mm
Intestinal wall infiltration		The thickest layer of tumor: _____ mm
RSM (only applicable to the ascending/descending segment)				[　]
Tumor staging
Invasion to submucosa (T1)				[　]
Tumor invades the muscularis propria but does not penetrate into the muscularis propria (T2)				[　]
Tumor breaks through muscularis propria (T3) <5 mm				[　]
Tumor breaks through muscularis propria (T3) ≥5 mm				[　]
Tumor invades beyond peritoneal coverage (T4a)				[　]
Invasion of adjacent organs (T4b)				[　]
Lymph node
No. of suspected positive lymph nodes in the region _____ Maximum short diameter _____
No. of suspected positive retroperitoneal lymph node _____ Maximum short diameter _____
EMVI				[　]
Distant metastases
Liver metastases
Lung metastases 　　　　　　　　Left lung　　　　　　 [　]　　　　　　 Right lung				[　]
Peritoneal implant metastases				[　]
Other metastatic lesions				[　]
Other abnormal signs
Tumor perforation				[　]
Intestinal obstruction				[　]
Diagnostic comments: ctT ___ N ___ M, EMVI (　).