Brief Education on Microvasculature and Pit Pattern for Trainees Significantly Improves Estimation of the Invasion Depth of Colorectal Tumors

Table 1

Patient characteristics and histopathological features of the tumors.

Patients	35
Male : female	14 : 21
Age, mean ± SD (years)	61.0±10.5
Location
Right colon	14
Left colon	9
Rectum	12
Size, mean ± SD (cm)	3.0±1.0
Final pathology
Low-grade neoplasia	13
Noninvasive high-grade neoplasia	8
Invasive carcinoma with submucosal invasion of 1000 μm or less	7
Invasive carcinoma with submucosal invasion of more than 1000 μm	7

SD: standard deviation.