IgA and partial deletions of chromosome 18.
D000361:Agammaglobulinemia / Q000235:genetics*; D002648:Child; D002869:Chromosome Aberrations; D002902:Chromosomes, Human, 16-18; D003410:Cri-du-Chat Syndrome / Q000150:complications; D006801:Humans; D009030:Mosaicism; D014314:Trisomy