NEIL1 and desmoid tumor: DNA was available from a colorectal tubular adenoma from the index of FAP104 (compound heterozygous NEIL1; c.506G>A and c.821delT), two desmoid tumors from the paternal aunt of the index of FAP104 (heterozygous NEIL1 c.506G>A), and a colorectal carcinoma from the index of ARG046 (heterozygous NEIL1 c.506G>A) for somatic mutational profiling.