部分肿瘤患者需要进行康复治疗。如骨肿瘤、四肢软组织肿瘤等，会影响肢体正常活动，需要针对性地做肌肉、神经功能训练，促进功能恢复；如喉部肿瘤经治疗后会影响说话、吞咽功能，需要及时做开口、吞咽、发声练习，提高生活质量。
The enhanced understanding of molecular biology and cellular biology because of cancer investigate has led to new treatment options for most cancers since US President Richard Nixon declared the "War on Cancer" in 1971.
The central part of DNA destruction and epigenetic defects in DNA fix genes in carcinogenesis The classical look at of most cancers is often a set of ailments pushed by progressive genetic abnormalities that come with mutations in tumor-suppressor genes and oncogenes, As well as in chromosomal abnormalities. A job for epigenetic alterations was determined in the early twenty first century.[103]
癌症易复发、转移，早期患者复发率、转移率偏低，有些可治愈，中晚期患者复发率、转移率、致死率高，通常预后不良。
Carcinoma: Cancers derived from epithelial cells. This group features most of the commonest cancers and include nearly all These during the breast, prostate, lung, pancreas and colon. Many of these are from the adenocarcinoma type, which means which the cancer has gland-like differentiation.
物理致癌物，例如紫外线和电离辐射；而异物刺激、创伤、慢性炎症等会促进恶变进程。
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。
癌症篩檢的爭議在於檢驗是否的確能夠延長生命，由於癌症的治療方法多半具有侵入性及對身體造成很大負擔，因為早期發現而進行治療反而不一定比完全不治療好。例如，在進行前列腺癌篩檢時，攝護腺抗原血液檢驗可偵測到極微小的腫瘤，但是或許終其一生，這樣的腫瘤並不會成為危及生命的問題。只是一旦經篩檢發現，一般都會進行進一步的檢驗及診療。因此就有可能發生過度診斷（英语：overdiagnosis）的問題，而將病患放入不必要的併發症的風險中，如手術或放射治療的副作用與感染。用於確定診斷前列腺癌所做的前列腺組織切片可能引起的副作用，包括出血和感染。前列腺癌的治療則可能導致尿失禁、勃起功能障礙。同樣地，對於乳癌的篩檢上，近來也有批評認為在一些國家所進行的乳房篩檢計畫所引起問題遠超過所解決的。因為在一般婦女身上做篩檢，產生許多因為陽性或假陽性結果而需要做更精確檢驗的婦女，造成醫療資源的大量浪費，也帶給假陽性者的沉重心理負擔。而這樣大規模的檢驗，最後往往只是找出幾個早期乳癌患者，所耗費的社會成本是值得討論的。
雖然癌症症狀的治療並不被視為是癌症的治療方法，但對於癌症病患的生活品質有重要的幫助，也能用來評估病患是否能進一步接受其他治療。儘管所有醫師都能夠使用藥物來減輕或抑制疼痛、噁心、嘔吐、腹瀉、出血及其他癌症患者常見的症狀，舒緩治療的進一步發展對於有這一方面的需求的病患仍然是相當重要的。
Individuals that survive cancer develop a 2nd Most important cancer at about twice the rate of Those people in no way diagnosed.[208] The amplified threat is thought to generally be a result of the random prospect of creating any cancer, the probability of surviving the 1st most cancers, exactly the same chance factors that created the primary cancer, undesirable side effects of treating the very first cancer (especially radiation therapy), and far better compliance 癌症 with screening.[208]
Some slow-expanding cancers are specially common, but usually are not lethal. Autopsy research in Europe and Asia showed that around 36% of folks have undiagnosed and evidently harmless thyroid cancer at the time in their deaths Which 80% of Gentlemen establish prostate most cancers by age eighty.
Disruption of a single gene may consequence from integration of genomic substance from a DNA virus or retrovirus, resulting in the expression of viral oncogenes during the influenced cell and its descendants.
根據組織診斷可判定腫瘤的生長程度，其病程的分級和其他腫瘤特徵。這樣的資訊對於判斷病患的預後情形和選擇最佳治療方式上非常有用。細胞遺傳學和免疫組織化學染色法對於提供有關癌細胞未來可能的發展情況以及選擇治療方式上，都佔有相當重要的角色。
发热：以低热多见，通常不需处理。典型淋巴瘤患者可有发热、盗汗、体重减轻症状。