在20%的病例中，软脑膜血管瘤病可以是双侧性的。

The pial angiomatosis may be bilateral in 20% of cases.

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一想到嗜铬细胞瘤一定要记得10%这个数值：10%的肿瘤是双侧的，10%发生于儿童，10%的肿瘤是恶性的。

Remember 10% when you think of a pheochromocytoma: 10% are bilateral, 10% are in children, 10% are malignant.

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瘤外供血动脉栓塞会导致丰富的侧支循环形成，失去再次栓塞的机会。

If infusion was given by the supplying arteries outside the tumor, it would cause the formation of plentiful collateral circulation, and lost the another opportunities of embolization.

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