Laterally spreading tumors: Limitations of computed tomography colonography

Table 1 Characteristics of laterally spreading tumor reviewed prospectively n (%)

Morphology	Granular type	34 (72)
	Non-granular type	13 (28)
Anatomical location	Proximal colon	18 (38)
	Distal colon	19 (40)
	Rectum	10 (21)
Size	15-29 mm	24 (51)
	30-39 mm	11 (23)
	40 mm or greater	12 (26)
Histology	Adenoma	19 (40)
	Mucosal cancer (Tis)	19 (40)
	Invasive cancer (T1)	9 (19)

Table 2 Detection rates of laterally spreading tumor by morphology, anatomical location, size category and histology

		n	Detection rate (95%CI)	P value
Overall		47	60% (44-74)
Morphology	Granular type	34	71% (53-85)	0.013
	Non-granular type	13	31% (9-61)
Location	Proximal colon	18	44% (22-69)	0.250
	Distal colon	19	68% (43-87)
	Rectum	10	70% (35-93)
Size	15-29 mm	24	54% (33-74)	0.134
	30-39 mm	11	45% (17-77)
	40 mm or greater	12	83% (52-98)
Histology	Adenoma	19	32% (13-57)	0.006
	Mucosal cancer (Tis)	19	79% (54-94)
	Invasive cancer (T1)	9	78% (40-97)

P value is calculated by the χ² test.