Introduction. Coincidence of X-linked agammaglobulinemia (XLA) and secondary hemophagocytic syndrome (sHS) is atypical. Both diseases are rare and pathogenesis of the latter one is not clearly known. Case Presentation. A 5-year-old boy was diagnosed both with XLA and sHS. However, in his history, he did not have severe and recurrent infections. Bruton tyrosine kinase (BTK) gene mutation was pre...
