The main symptoms of ADA<unk>  are pneumonia, chronic diarrhea, and widespread skin rashes. Affected children also grow much more slowly than healthy children and some have developmental delay. Most individuals with ADA<unk>  are diagnosed with SCID in the first 6 months of life. An association with polyarteritis nodosa has been reported.
Adenosine deaminase deficiency
Adenosine deaminase 2 deficiency
Adenine phosphoribosyltransferase deficiency
Guanidinoacetate methyltransferase deficiency
Galactose-1-phosphate uridylyltransferase deficiency
Methylenetetrahydrofolate reductase deficiency
Mevalonate kinase deficiency
Adenosine monophosphate deaminase deficiency type 1