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目的：采用鼻咽侧位平片测定儿童增殖腺－鼻咽腔比率（Ａ／Ｎ比率）来判断儿童的增殖腺属正常抑或病理性肥大。材料与方法：随机选择１０６例门诊诊断为分泌性中耳炎的患儿，在治疗前作Ａ／Ｎ比率测定。结果：Ａ／Ｎ比率在０．５０～０．７０内，经保守治疗后症状可显著改善，而Ａ／Ｎ比率≥０．７１的患儿中有半数需行增殖腺刮除术。结论：Ａ／Ｎ比率是一种实用、方便的增殖腺Ｘ线测定方法。当Ａ／Ｎ比率≥０．７１时为增殖腺病理性肥大。
OBJECTIVE: To determine the adeno-nasopharyngeal ratio (A / N ratio) in children with or without nasopharyngeal plain radiographs to determine the normal or pathological hypertrophy in children. Materials and Methods: A total of 106 children diagnosed as otitis media with effusion were randomly selected, and the A / N ratio was measured before treatment. Results: The A / N ratio ranged from 0.50 to 0.70. After conservative treatment, the symptoms could be significantly improved. Half of the children with A / N ratio ≥0.71 had adenoidectomy. Conclusion: The A / N ratio is a practical and convenient method for the determination of proliferating adenocarcinoma. Adeno-pathological hypertrophy was observed when A / N ratio ≥0.71.