Diseases associated with ADA2 include Sneddon syndrome (SNDNS, OMIM#182410), vasculitis, autoinflammation, immunodeficiency and hematologic defects syndrome (VAIHS, OMIM#615688), Kaposi sarcoma susceptibility, and Diamond‐Blackfan anemia 1. The gene discussed is ADA2; the disease is Sneddon syndrome.