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Local indications could arise a result of the mass of your tumor or its ulceration. For example, mass outcomes from lung cancer can block the bronchus causing cough or pneumonia; esophageal cancer could potentially cause narrowing of the esophagus, rendering it challenging or painful to swallow; and colorectal most cancers might bring about narrowing or blockages while in the bowel, impacting bowel behaviors. Masses in breasts or testicles might create observable lumps.
Cancers comprise a large family of illnesses that contain abnormal cell growth While using the opportunity to invade or unfold to other parts of the human body.
筛查规划仅对某些类型而非所有类型的癌症有效，而且一般来说，筛查规划比早期诊断复杂得多并需要更大量的资源，包括需要特殊设备和专门人员。即使建立了筛查规划，早期诊断规划也依然必要，以便查明那些发生在不符合筛查的年龄或风险因素标准的人群中的癌症病例。
For many frequent cancers, the English organ title is utilised. One example is, the most common type of breast most cancers is referred to as ductal carcinoma in the breast. Listed here, the adjective ductal refers to the appearance of most cancers under the microscope, which suggests that it's got originated in the milk ducts.
例如，如果您遗传了一种使您易患癌症的基因突变，并不意味着您一定会患癌症。可能需要有一个或多个其他基因突变才会引起癌症。当您接触某种致癌物质时，您的遗传基因突变可能使您比其他人更容易患癌症。
一些最常见的癌症类型，如乳腺癌、宫颈癌、口腔癌和结肠直肠癌等，如能早期发现并根据最佳做法进行治疗，治愈概率很高。
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您可以通过改变这些习惯来降低患癌风险，尽管有些习惯比其他习惯更难改变。
Engraving with two sights of the Dutch female who experienced a tumor faraway from her neck in 1689 Most cancers has existed for all of human record.[226] The earliest written document pertaining to cancer is from c. 1600 BC while in the Egyptian Edwin Smith Papyrus and describes breast most cancers.[226] Hippocrates (c. 460 BC – c. 370 BC) described numerous sorts of most cancers, referring to them While using the Greek phrase καρκίνος karkinos (crab or crayfish).[226] This title arises from the looks on the Minimize surface of the reliable malignant tumor, with "the veins stretched on all sides since the animal the crab has its feet, whence it derives its name".
癌症发病率随着年龄的增长而急剧上升，这很可能是因为特定癌症的风险随着年龄的增长而增加。随着年龄的增长，整体风险不断积累，而同时细胞修复机制的有效性则呈下降趋势。
Cure is mostly the same as for non-pregnant Girls. Nonetheless, radiation and radioactive medication are normally prevented for the duration of pregnancy, especially if the fetal dose might exceed 100 cGy. In some cases, some or all treatments are postponed until right after birth If your cancer is diagnosed late during the pregnancy.
如果发现早，癌症更有可能对治疗做出反应，从而大大提高存活概率，同时降低发病率和治疗费用。通过早期发现癌症和避免延误治疗，可大大改善癌症患者的生活。
Deficient expression of DNA restore proteins due to an inherited mutation can boost most cancers pitfalls. People today with an inherited impairment in almost any of 34 DNA repair genes (see post DNA restore-deficiency 癌症 condition) have elevated most cancers chance, with some defects ensuring a one hundred% lifetime potential for cancer (e.