Based on the clinical and postmortem pathological data collected from January 1982 to December 1989, 30 cases of neonatal death from MAS within one week after dclivery were studied to investigate the causes of death The result showed that 2 of the 30 cases died of irreversible severe asphxxia(6.7%), 7(23.3%) of pneumatothorax, 8(26.7%) of pneumonrrhagia, 6(20.0%) of lung hyaline membrane disease, 1(3.3%) of pncumo-nia 3(10.0%) of cerebral oclecma, ana, 3(10.0%) of heart failure. The paper also discussed the...