Immunodeficiency 16, also known as combined immunodeficiency due to ox40 deficiency, is related to mixed oligodendroglioma-astrocytoma and blepharoconjunctivitis. An important gene associated with Immunodeficiency 16 is TNFRSF4 (TNF Receptor Superfamily Member 4), and among its related pathways/superpathways are Innate Immune System and ERK Signaling. Affiliated tissues include b cells and bone marrow, and related phenotypes are kaposi's sarcoma and splenomegaly