Extradural ectopic meningioma is a rare tumor.

硬膜外异位脑膜瘤是一种罕见的肿瘤。

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Objective: to explore a new inspection method for the diagnosis of intracranial meningioma, and to expand the use of CTA.

目的：拓宽螺旋CT血管造影(CTA)检查范围，探索颅内脑膜瘤新的影像检查方式。

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At medium power, this meningioma is composed of whorled nests of cells. A variety of patterns are possible.

中倍镜，脑膜瘤由涡漩状细胞巢构成，也可能有多种形状。

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Between 6, 500 and 10, 000 people in the U.S. are diagnosed with a meningioma each year.

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Even more troubling was the finding that people who had been given a panorex when they were under ten had 4.9 times the normal risk of developing a meningioma.

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The researchers found that people who had had a meningioma were more than twice as likely as those who had not to have had at least one bitewing X-ray.

ECONOMIST: Confirmation that dental X-rays can be bad for you