Elective abortions usually are not necessary and, for the commonest kinds and stages of most cancers, tend not to Enhance the mother's survival.
选择某些生活方式会增加患癌风险。抽烟、女性每天饮酒超过一杯、男性每天饮酒两杯以上、过度暴露在阳光下或经常晒伤起疱、肥胖和不安全的性行为都可能导致癌症。
溃疡性结肠炎等一些慢性健康状况会导致患某些癌症的风险显著增加。向医生咨询相关风险。
乙肝病毒、丙肝病毒和某些类型的人乳头瘤病毒可分别增加罹患肝癌和宫颈癌的危险。艾滋病毒感染会使患宫颈癌的风险增加六倍，并还会大幅增加患其他癌症，如卡波西肉瘤的风险。
Upper body X-ray demonstrating lung most cancers during the remaining lung Most cancers are to begin with identified possibly as a result of visual appeal of signals or signs and symptoms or by way of screening.[one hundred twenty five] Neither of those contributes to a definitive prognosis, which needs the examination of a tissue sample by a pathologist.
只有一小部分癌症是由于遗传疾病所致。如果癌症在您的家族中较为常见，则突变可能从一代传给下一代。您可能适合接受基因检测，以确认您是否遗传了可能增加某些癌症风险的突变。请记住，遗传基因突变并不表示肯定会罹患癌症。
現代人工作忙碌，飲食習慣差，多為外食、重口味並常延遲用餐，加上生活壓力大、熬夜、作息不穩定，以及長期久坐、缺乏運動等，這些不良生活習慣都會增加罹癌風險。
A considerable proportion of cancers are adenocarcinomas, with typical histopathology characteristics revealed, Even though they fluctuate significantly from scenario to scenario. Cancers are categorised by the type of mobile that the tumor cells resemble and is also hence presumed to generally be the origin from the tumor. These forms include:
Local indications may well arise a result of the mass in the tumor or its ulceration. For instance, mass consequences from lung most cancers can block the bronchus leading to cough or pneumonia; esophageal most cancers can result in narrowing from the esophagus, making it difficult or agonizing to swallow; and colorectal most cancers may possibly cause narrowing or blockages from the bowel, affecting bowel behaviors. Masses in breasts or testicles may make observable lumps.
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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。
Individuals that report a greater quality of life are inclined to outlive longer.[209] People with decrease Standard of living can be afflicted by despair along with other difficulties and/or disease development that both impairs high quality and quantity of lifestyle. Furthermore, sufferers with worse prognoses could be depressed or report poorer Standard of living because they understand that their ailment is probably going to get fatal.[citation needed]
用醫學影像技術檢測癌症，也遭遇類似問題。這些醫學影像檢測技術都是成本相當高且耗費時間。由於偵測的靈敏度極高，常發現細胞病變（英语：incidentaloma），這樣的腫瘤也可以被認為惡性，而進行具有潛在危險性的治療方法。
Carcinoma: Cancers derived from epithelial cells. This group 癌症 consists of many of the most common cancers and include things like nearly all People from the breast, prostate, lung, pancreas and colon. Most of these are of the adenocarcinoma type, which means that the most cancers has gland-like differentiation.