恶心。某些癌症和癌症治疗会导致恶心。医生有时可以预测您的治疗是否可能会引起恶心。药物和其他治疗可帮助您预防或减少恶心。
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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。
大脑和神经系统问题。癌症会压迫到附近的神经，导致身体某一部位疼痛和丧失功能。累及大脑的癌症可能导致头痛和卒中样体征和症状，例如身体一侧无力。
早期發現對於癌症治療的成功至關重要。癥狀可能因癌症類型和受影響的器官而異，但常見指標包括： 不明原因的體重減輕
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癌症患者治療和研究的進展限於醫師間各自的研究與測試，直到第二次世界大戰時期，許多醫學研究中心發現同一種疾病在不同國家間的發生率差別相當大，也促使各國的公共衛生組織互相通報疾病及流通醫院治療的資料，直到今日仍然是廣為各國採用。日本醫學界觀察到廣島和長崎原子彈受害者的骨髓完全被毀壞。他們認為放射線可能也可用來治療有問題的骨髓，這項發現開啟了使用骨髓移植治療白血病的想法。
局部症狀：異常腫塊或腫脹（腫瘤），出血，疼痛和潰瘍。因為腫瘤壓迫周遭組織所引起的症狀，如黃疸。
确定用于癌症预防和控制的“最合算措施”和其他具有成本效益的重点策略；
因p53突變而引起的李佛美尼症候群，會產生多種腫瘤，包含骨肉瘤、乳癌、軟組織肉瘤、腦瘤。
Big-scale mutations include the deletion or acquire of a percentage of a chromosome. Genomic amplification occurs when a mobile gains copies (often twenty or even more) of a small chromosomal locus, normally that contains one or more oncogenes and adjacent genetic material. Translocation takes place when two different chromosomal areas turn into abnormally fused, typically at a attribute spot.
Human immunodeficiency virus (HIV) does circuitously trigger most cancers nevertheless it causes immune deficiency which will magnify the danger due to other infections, in some cases approximately several thousandfold (in the case of Kaposi's sarcoma). Importantly, vaccination from the hepatitis B virus and the human papillomavirus are already revealed to just about get rid of the chance of cancers a result of these viruses in persons efficiently vaccinated previous to an infection.
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。
If a substantial mistake happens, the broken mobile can self-destruct by way of programmed mobile Dying, termed apoptosis. If the mistake control processes 癌症 fall short, then the mutations will survive and be handed together to daughter cells.