In spite of the significant differences in the CTNNB1 expression level among these subpopulations, the discrepancy is much smaller in the proportion of the mutated cells among the cells where CTNNB1 exon 3 was detected, ranging from 31% in T5 to 74% in T3, which are not very far from 50%, the expected proportion of a heterozygous mutation, indicating that these cells are indeed tumor cells. This evidence concerns the gene CTNNB1 and neoplasm.