翻訳と辞書 Words near each other ・ Mass destruction ・ Mass Destruction (song) ・ Mass Destruction (video game) ・ Mass deworming ・ Mass diffusivity ・ Mass Distraction ・ Mass distribution ・ Mass drawing ・ Mass driver ・ Mass Driver 1 ・ Mass drug administration ・ Mass E Bhat ・ Mass Effect ・ Mass Effect (comics) ・ Mass effect (disambiguation) ・ Mass effect (medicine) ・ Mass Effect (video game) ・ Mass Effect 2 ・ Mass Effect 2 downloadable content ・ Mass Effect 3 ・ Mass Effect 3 downloadable content ・ Mass Effect Galaxy ・ Mass Effect Infiltrator ・ Mass escapes from German POW camps ・ Mass estimation ・ Mass excess ・ Mass executions in the Srebrenica massacre ・ Mass fainting in Tanzania ・ Mass fatality incident ・ Mass finishing Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Mass effect (medicine) ： ウィキペディア英語版 Mass effect (medicine) In medicine, a mass effect is the effect of a growing mass that results in secondary pathological effects by pushing on or displacing surrounding tissue. In oncology, the mass typically refers to a tumor. For example, cancer of the thyroid gland may cause symptoms due to compressions of certain structures of the head and neck; pressure on the laryngeal nerves may cause voice changes, narrowing of the windpipe may cause stridor, pressure on the gullet may cause dysphagia and so on. Surgical removal or debulking is sometimes used to alleviate symptoms of the mass effect even if the underlying pathology is not curable. In neurology, mass effect is a general term applied to the effects exerted by any mass, including, for example, an evolving intracerebral hemorrhage (a bleeding within the skull) presenting with a clinically significant hematoma. The hematoma can exert a mass effect on the brain, increasing intracranial pressure and potentially causing midline shift or deadly brain herniation. In the past this effect held additional diagnostic importance since prior to the invention of modern tomographic soft-tissue imaging utilizing MRI or CT it was not possible to directly image many kinds of primary intracranial lesions. Hence in those days, the mass effect of these abnormalities on surrounding structures was sometimes used to indirectly infer the existence of the primary abnormalities themselves, for example by using a cerebral angiography to observe the secondary vascular displacement caused by a subdural hematoma pushing on the brain, or by looking for a distortion caused by a tumor on the normal outline of the ventricles as depicted on a pneumoencephalogram. Unfortunately, these studies were often invasive and uncomfortable for patients and provided only a partial assessment of the condition being examined. Nowadays modern diagnostic tools exist which allow physicians to easily locate and visualize all kinds of intracranial lesions without having to rely on indirect effects to make a reliable diagnosis. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mass effect (medicine)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.