The head circumference increases significantly secondary to obstructive hydrocephalus .

患儿在阻塞性脑积水发生后头围显著增大。

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Method Of the 12 patients with hydrocephalus, 10 had primary aqueduct obstruction with the other 2 suffering the obstruction secondary to tectal tumors.

方法12例脑积水患者中导水管水平阻塞为原发性10例，继发于顶盖区肿瘤者2例。

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