Immunodeficiency 105, also known as severe combined immunodeficiency, autosomal recessive, t cell-negative, b cell-positive, nk cell-positive, is related to immunodeficiency 104. An important gene associated with Immunodeficiency 105 is PTPRC (Protein Tyrosine Phosphatase Receptor Type C). Affiliated tissues include nk cells and t cells, and related phenotypes are fever and lymphopenia