Table 1

Features of ACF in patients with HNPCC and in patients with sporadic colorectal cancer

Patient no.Patient age (years)ACF no.SiteHistologyMultiplicity (no. of crypts per focus)MSI
HNPCC1511RaH52+
2RH25+
2583RH12+
4RH35+
5RH300+
3346RD300+
4467RD200+
Sporadic CRC1651LH50
2LH25
2943RD100
4RD250
5RD400
3786RH8
4597RH70
5778RD200+
9RD13+
  • a R, right colon (cecum, ascending colon, hepatic flexure, transverse colon, and splenic flexure); H, hyperplastic ACF; D, dysplastic ACF; L, left colon (descending and sigmoid colon, rectum); CRC, colorectal cancer.