Methods Five patients with organic acidemias were screened by urine organic acid analysis(gas chromotography-mass spectrometry,GC/MS),3 cases of methylmalolic acidemias(MMA) and 2 cases of propionic acidemias(PA) were confirmed.

• 方法应用气相色谱-质谱联用仪(GC/MS)对5例病人的尿样本作有机酸分析,进行筛查诊断,对3例丙二酸血症(MMA)及2例丙酸血症(PA)作以确诊。