Agammaglobulinemia 4, Autosomal Recessive, also known as agammaglobulinemia 4, is related to mcd diffuse large b-cell lymphoma and b-cell prolymphocytic leukemia, and has symptoms including diarrhea An important gene associated with Agammaglobulinemia 4, Autosomal Recessive is BLNK (B Cell Linker), and among its related pathways/superpathways are Innate Immune System and GPCR Pathway. Affiliated tissues include b cells and t cells, and related phenotypes are recurrent otitis media and recurrent pneumonia