Immunodeficiency 75 with Lymphoproliferation, also known as immunodeficiency 75, is related to atypical chronic myeloid leukemia, bcr-abl1 negative and third-degree atrioventricular block. An important gene associated with Immunodeficiency 75 with Lymphoproliferation is TET2 (Tet Methylcytosine Dioxygenase 2). Affiliated tissues include b cells and t cells, and related phenotypes are recurrent respiratory infections and bronchiectasis