Immunodeficiency 50, also known as combined immunodeficiency due to moesin deficiency, is related to turner syndrome and lymphopenia. An important gene associated with Immunodeficiency 50 is MSN (Moesin), and among its related pathways/superpathways are Blood-Brain Barrier and Immune Cell Transmigration: VCAM-1/CD106 Signaling and Cytoskeletal Signaling. Affiliated tissues include t cells and nk cells, and related phenotypes are recurrent respiratory infections and lymphopenia