Fewer than 4% of brain tumours present with a headache.

不超过4%的脑肿瘤患者伴有头痛症状。

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More than 13,600 Swedes have developed brain tumours in the intervening decades.

在这之间的几十年中超过13，600瑞典人得了脑癌。

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Viruses may cause up to 40 percent of cancers including brain tumours and leukaemia, scientists claim.

据英国《每日邮报》10月17日报道，科学家称包括脑肿瘤和白血病在内，有百分之四十的癌症可能由病毒引起。

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Dr Judith Kingston, paediatric oncologist at Great Ormond Street Hospital said they were now trying the treatment in other brain tumours.

BBC: NEWS | Health | Chemo best for child brain cancer

If there are any problems with the way we are treating brain tumours, we need to address them as rapidly as possible.

BBC: NEWS | Health | UK 'behind best' on child cancer

However, none of the six groupings - which included acute lymphoblastic leukaemia, brain tumours and Hodgkin's disease - showed an increasing trend between levels of radiation and rate of disease.

BBC: Radon cancer fears dismissed