CD79A and obstructive sleep apnea syndrome: Therefore, they recommended to perform immune function examination before tonsillectomy.11 The serum IgA level of children with OSAHS herein was significantly higher than that of the control group (P<0.05), being consistent with the finding of Khan et al.10 Children with OSAHS are subjected to a series of hypoxia-reoxygenation processes induced by repeated airway collapse during sleep, resembling the pathological and physiological processes of ischemia-reperfusion.