Accuracy of colon tumor localization: Computed tomography scanning as a complement to colonoscopy

Table 1 Number and percent (%) of tumors per colon segment that were correctly or incorrectly localized by colonoscopy, and correctly, incorrectly or not localized by CT scan

Surgical location	Colonoscope		CT			Total
	Right	Wrong	Right	Wrong	Not detected
Cecum	22 (64.7)	12 (35.3)	19 (55.9)	8 (23.5)	7 (20.6)	34
Ascending colon	21 (84.0)	4 (16.0)	12 (48.0)	7 (28.0)	6 (24.0)	25
Transverse	4 (80.0)	1 (20.0)	2 (40.0)	0	3 (60.0)	5
Descending colon	9 (69.2)	4 (30.8)	7 (53.8)	0	6 (46.1)	13
Sigmoid	27 (100.0)	0	12 (44.4)	3 (11.1)	12 (44.4)	27
Total	83	21	52	18	34	104
Percentage (%)	79.80	20.20	50.00	17.30	32.70

Table 2 Mean tumor size in centimeters per colon segment (C: correct, I: Incorrect), as detected by colonoscopy or CT scanning

Surgical location	Colonoscope		CT			Mean	Standard deviation
	C: mean size	I: mean size	C: mean size	I: mean size	Not detected
Cecum	5.67	6.35	7.02	5.29	3.69	5.89	3.23
Ascending colon	6.4	5.75	7.25	6.27	4.43	6.3	3.79
Transverse colon	3.86	6	4.5	0	4.17	4.5	1.85
Descending colon	3.95	10.75	8.76	0	2.22	4.64	2.83
Sigmoid	5.01	0	5.21	6.5	4.44	5.01	1.47
Mean	5.39	7.09	6.79	5.87	3.98	5.72
Standard deviation	3.34	1.49	3.48	2.62	1.75	3.11