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得了脑癌不好治

kira86 于2008-05-28发布 l 已有人浏览
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Brain Cancer Like Kennedy's Is Difficult to Treat 迅雷专用高速下载 This is the VOA Special English Health Rep
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 Brain Cancer Like Kennedy's Is Difficult to Treat


迅雷专用高速下载

This is the VOA Special English Health Report.

Last week doctors in Massachusetts announced that Senator Ted Kennedy has brain cancer.

The news came after he suffered a seizure. Doctors found a glioma, a growth in the supportive tissue of the brain. The glial tissue is where the largest percentage of brain tumors begin.

More than forty percent of growths in the brain are gliomas. But they make up almost eighty percent of cancerous growths, like the malignant glioma that Senator Kennedy has. Seizures and headaches are common first signs of a glioma.

Cancerous glial tumors generally spread in the brain the way roots spread from a plant. That makes removing the tumor more difficult. A clear border between the cancer and healthy tissue can be difficult to find.

The location of the glioma must also be considered when deciding treatment. Senator Kennedy’s tumor is in the left parietal lobe of the brain. This area is involved in some sensory understanding and spatial recognition, as well as language, reading and vision.

Removal of a glioma from this area can result in speech problems and other disabilities.

Some cancer experts believe that doctors are unlikely to operate on Senator Kennedy. They say the likely treatment is radiation and chemotherapy.

But chemical treatment for brain cancer is complex because of the protective blood-brain barrier. It stops some chemicals from entering the brain, including many chemo drugs.

Radiation treatments for brain cancer have improved a lot in recent years. New methods and equipment can permit extremely localized treatments that are less likely to damage healthy tissue.

Research into brain cancer treatment also includes drug therapy. In two thousand five, a drug called temozolomide(替莫唑胺,一种抗肿瘤的药剂) was shown to add a few months to the lives of brain cancer patients.

And researchers are studying uses for the cancer drug Avastin. It is already used to treat breast, colon and lung cancer. It starves tumors by blocking blood flow to the growths.

The United States has about ten thousand new cancerous gliomas a year. Half of the people die within fifteen months. Malignant gliomas are more aggressive in older people.

Ted Kennedy is seventy-six years old. The senator competed Monday in the second half of a boat race in Massachusetts, finishing second in his five-boat division.

And that’s the VOA Special English Health report, written by Caty Weaver. Transcripts and MP3s of our reports are at  voa.com. I’m Bob Doughty.

可防止癌症扩散保健品--黄鳝粉   

“黄鳝鱼素”降血糖   

我国现代医学对黄鳝的药用价值也进行了初步研究,从黄鳝肉中提炼出一种“黄鳝鱼素”,并从黄鳝鱼素中分离出黄鳝鱼素A和黄鳝鱼素B。这两种物质都具有显著的降血糖作用和调节血糖的生理机能,两者和用时,对血糖高的可以降糖,血糖低的可以升高,是糖尿病患者的理想食疗佳品。   

“脑黄金”使人聪明   

国内外学者还发现,黄鳝中含有丰富的DHA和EPA(即保健品市场上的“脑黄金”),它不仅使人的头脑聪明,而且这两种物质还具有抑制心血管病和抗癌、消炎的作用。   
国际上已认定黄鳝粉的DHA对人体的保健作用有:   
  1、降低血液中胆固醇浓度,可有效地防治动脉硬化引起的心血管疾病。   
  2、增加血液活性,减缓血液凝固的速率。   
  3、可有效地减轻人体体内外炎症。   
  4、可防止癌细胞的扩散。   
  5、提高大脑功能,防止大脑衰老。   
  6、胎儿发育的必需营养品,对奠定人脑高智能基础具有重要的潜能作用。   
  7、可延缓老年人智力因素,防治老年性痴呆。   
  8、据测定,黄鳝肉内不仅含有DHA,还含有较丰富的EPA。这两种物质具有抑制心血管病和抗癌、消炎的稳定功效。

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