Two IBD patients had the duplications partially overlapping the first one and spanned over the NPDC1, ENTPD2, SAPCD2, UAP1L1, MAN1B1-AS1 and MAN1B1 genes and another sample had a short duplication over the NPDC1, ENTPD2 and SAPCD2 genes. Here, NPDC1 is linked to inflammatory bowel disease.