Any autosomal agammaglobulinemia in which the cause of the disease is a mutation in the PIK3R1 gene. The disease is MONDO_0014083 (agammaglobulinemia 7, autosomal recessive). Also known as: PIK3R1 autosomal agammaglobulinemia, autosomal agammaglobulinemia caused by mutation in PIK3R1.