血氨过多的发作和急性新生儿型相似，但是最初的神经科症状可能比较轻微因为患者发病时年龄较大。

The episodes of hyperammonemia are similar to those seen in the acute neonatal form, but the initial neurologic findings may be more subtle because of the older age of the affected individuals.

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过量的蛋白质供给可导致血氨过高或血尿素氮升高，进而可发生液体负荷过多，胆汁淤积和渗透性利尿。

Excess protein may cause hyperammonemia or an elevated BUN. Fluid overload, cholestasis and osmotic diuresis are further problems which may occur.

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