Table 1.

Routine surveillance protocol according the local guidelines

Months after operation	Medical history and physical examination	Complete blood count (CEA, CA 19–9 included)	Contrast-enhanced abdominal ultrasound	Abdominal and chest computed tomoghapy	Colonoscopy
6	X	X	X
12	X	X		X	X
18	X	X	X
24	X	X		X
30	X	X	X
36	X	X		X	X
48	X	X	X
60	X	X			X