Adenosine Deaminase Deficiency, also known as ada deficiency, is related to severe combined immunodeficiency, autosomal recessive, t cell-negative, b cell-negative, nk cell-negative, due to adenosine deaminase deficiency and severe combined immunodeficiency due to adenosine deaminase deficiency. An important gene associated with Adenosine Deaminase Deficiency is ADA (Adenosine Deaminase), and among its related pathways/superpathways are Cytokine Signaling in Immune system and Metabolism of nucleotides. The drugs Busulfan and Immunosuppressive Agents have been mentioned in the context of this disorder. Affiliated tissues include lung and bone marrow, and related phenotypes are homeostasis/metabolism and cellular