Gastrointestinal Defects and Immunodeficiency Syndrome 1, also known as familial intestinal polyatresia syndrome, is related to intestinal atresia and pituitary adenoma 1, multiple types. An important gene associated with Gastrointestinal Defects and Immunodeficiency Syndrome 1 is TTC7A (Tetratricopeptide Repeat Domain 7A), and among its related pathways/superpathways are IL-10 Pathway and Other interleukin signaling. Affiliated tissues include pituitary and thymus, and related phenotypes are intestinal atresia and duodenal stenosis