Immunodeficiency 14b, Autosomal Recessive, is also known as imd14b. An important gene associated with Immunodeficiency 14b, Autosomal Recessive is PIK3CD (Phosphatidylinositol-4,5-Bisphosphate 3-Kinase Catalytic Subunit Delta). Affiliated tissues include b cells, and related phenotypes are inflammation of the large intestine and chronic diarrhea