Agammaglobulinemia 8a, Autosomal Dominant, is also known as agammaglobulinemia, autosomal dominant, due to tcf3 defect. An important gene associated with Agammaglobulinemia 8a, Autosomal Dominant is TCF3 (Transcription Factor 3). Affiliated tissues include b cells and bone marrow, and related phenotypes are agammaglobulinemia and recurrent infections