PTPN2 and inflammatory bowel disease: Given the overall lack of detailed phenotype analyses of PTPN2 in IBD, we initiated an extensive genotype-phenotype analysis in a large German cohort of IBD patients including 905 patients with CD, 318 patients with UC, and 908 healthy, unrelated controls which were genotyped for the two SNPs rs2542151 and rs7234029 in the PTPN2 region.