Using publicly available GWAS summary statistics for IBD, CDs, and UC (Liu et al., 2015; Elsworth et al., 2020) as outcomes, we found suggestive evidence that increased expression of MUC4 in the sigmoid, but not transverse, colon may increase the risk of IBD (nominal p-value=0.033, Supplementary file 6). This evidence concerns the gene MUC4 and inflammatory bowel disease.