NAV3 and colorectal carcinoma: Cells with NAV3 copy number changes were detected in 40% of MSS-type colorectal carcinoma samples as follows: a mixed cell population of those with NAV3 deletion and those with NAV3 amplification was detected in 15% of samples, NAV3 deletion alone in 15%, and low levels of NAV3 amplification (three to five copies) alone in 10%.