常见病征包括视力减退、影像扭曲（变形、变大或缩小）。
Common symptoms include reduced visual acuity, visual distortion (metamorphosia, macropsia and micropsia).
后来我们才发觉那是一种脑瘤的病征，错构瘤。
We later found out it was a symptom of a brain tumor, hamartoma.
已知该儿童与鸡、包括显示疾病征兆的一些鸡一起玩耍。
The child is known to have played with chickens, including some showing signs of illness.
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