Health encyclopaedia - Alphabetical Topic List健康百科全书-按字母顺序排列的主题清单

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Cancer癌症

Cancer is not a single disease but a range of about 200 different conditions caused by collections of abnormal cells dividing uncontrollably. Cancer is second only to diseases of the heart and blood vessels as a cause of death.癌症不是一个单一的疾病，但一系列的约200名不同条件下所造成的藏品不正常的细胞分裂失控。癌症是仅次于疾病的心脏和血管作为一个的死亡原因。 The word ‘tumour’ is often confused with cancer but actually only means a growth that may or may not be malignant.字â € 〜 tumourâ € ™往往是混淆与癌症，但实际上的唯一手段的增长可能是也可能不是恶性。 In other words, it may be ‘benign’, that is non-cancerous, and unable to spread to other parts of the body or recur.在其他的话，它可能â € 〜 benignâ € ™ ，即非癌变，并无法蔓延到身体其他部位或重演。 All cancers primarily affect older people.所有癌症的主要影响老年人的人。

Malignant tumours are the real cancers and they behave quite differently from benign tumours.恶性肿瘤是真正的癌症和他们的表现相当不同，从良性的肿瘤。 There are two broad classes of cancers.有两种广泛类别的癌症。 Those that arise from surface linings of organs are the commonest group and are called carcinomas.那些出现从表面衬里的机关是最常见的小组被称为癌。 The second group called sarcomas, arise from the substance of solid tissues such as muscle, bone, lymph glands, blood vessels and fibrous and other connective tissues. Sarcomas are generally much less common than carcinomas.第二组所谓的肉瘤，出现的实质固体组织，如肌肉，骨骼，淋巴腺体，血管和纤维和其他结缔组织。肉瘤一般都少得多，比常见的癌。 Both carcinomas and sarcomas are able to invade normal tissue and spread through the body.双方癌和肉瘤是能够侵入正常组织和蔓延，通过身体。

Throughout nearly all the tissues of the body, there are thin-walled tubes called lymphatic ducts.全国各地几乎所有的组织机构，有薄薄壁管所谓的淋巴管道。 Their job is to carry off excess fluid from the tissues back to the bloodstream.他们的工作是进行过超过临界流体从组织回到血液中。 Lymphatic ducts are very easily invaded by cancers, and this is a very common way for cancer cells to spread.淋巴管道是很容易入侵的癌症，这是一个很常见的方式，为癌细胞的扩散。

Cancers vary greatly in the speed with which they spread. Tumours of high malignancy will sometimes have spread widely before they are diagnosed.癌症有很大差异，在速度与它们的扩散。肿瘤的恶性程度高，有时会已广泛传播之前，他们的诊断。