无码中文字幕一Av王,97亚洲综合色成在线,中文字幕无码无遮挡在线看,久久99久久国产精品

您現在的位置: Language Tips> Audio & Video> Special Speed News  
   
 





 
Brain cancer like Kennedy's is difficult to treat
[ 2008-05-28 09:46 ]

 

Download

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 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 voaspecialenglish.com. I’m Bob Doughty.

glioma:神經膠質瘤(腦神經或脊神經束上產生的腫瘤)

(Source: VOA 英語點津姍姍編輯)

 
英語點津版權說明:凡注明來源為“英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883631聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。
相關文章 Related Story
 
 
 
本頻道最新推薦
 
Walking in the US first lady's shoes
“準確無誤”如何表達
英國新晉超女蘇珊大媽改頭換面
豬流感 swine flu
你有lottery mentality嗎
翻吧推薦
 
論壇熱貼
 
別亂扔垃圾。怎么譯這個亂字呀?
橘子,橙子用英文怎么區分?
看Gossip Girl學英語
端午節怎么翻譯?
母親,您在天堂還好嗎?