XIAP and hyperinsulinemic hypoglycemia, familial, 4: Notably, before P38 was diagnosed with XIAP deficiency by gene sequencing, he was pathologically diagnosed with T cell lymphoma and received two rounds of CHOP chemotherapy; however, considering that there have been no reports of XIAP deficiency with lymphoma to date, and that the condition of P38 is generally improving, we excluded the diagnosis of lymphoma and considered that the patient had lymphoid hyperplasia.