癌細胞擴散至距離原始腫瘤遙遠的器官及組織。此時癌細胞流竄於全身，必需借助循環全身的化學治療藥物治療。安寧照護將是治療選項之一。
原癌基因在环境或遗传因素作用下，改变自身结构，转变为癌基因，使正常细胞转化为肿瘤细胞。
Veterinary oncology, concentrating mostly on cats and puppies, is often a growing specialty in rich nations and the foremost sorts of human therapy for example surgery and radiotherapy may be offered.
第五步——浸润性癌，如果基因变化使肿瘤开始侵入下层组织，并使细胞脱落到血液或淋巴中， 则认为肿瘤已变成恶性肿瘤。癌变的细胞很可能在全身形成新的肿瘤（转移）；这些可能会因破坏重要器官而致命。
Some types of cancer are named for the size and form on the cells underneath a microscope, such as giant cell carcinoma, spindle cell carcinoma and little-cell carcinoma.
中医治疗癌症在我国由来已久，常用治法包括扶正培本法、清热解毒法、活血化瘀法、软坚散结法。
DNA fix inhibition is proposed to become a predominant system in significant metallic-induced carcinogenicity. Moreover, Regular epigenetic alterations in the DNA sequences code for little RNAs referred to as microRNAs (or miRNAs). miRNAs will not code for proteins, but can "concentrate on" protein-coding genes and reduce their expression.
癌症患者的临床表现与发病部位、大小、有无转移、发展时期等因素有关。病变早期多无显著症状，随病变进展，可出现肿块、疼痛、出血、梗阻等局部症状，以及发热、乏力、贫血、消瘦等全身症状。
The phrase emanates from The traditional Greek καρκίνος, which means 'crab' and 'tumor'. Greek medical professionals Hippocrates and Galen, among Other people, observed the similarity of crabs to some tumors with swollen veins. The word was released in English in the modern medical feeling about 1600.[28]
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Elective abortions are not necessary and, for the most typical varieties and phases of cancer, tend not to Enhance the mom's survival.
Le gouvernement thaïlandais a heureusement pris conscience de ces réalités et investit dans des usines de retraitement des déchets
癌症的临床症状与发病部位、病变大小、是否转移等因素相关，早期可能无显著症状，随病变进展，可出现肿块、疼痛、出血、梗阻等局部症状，以及发热、乏力、贫血、消瘦等全身症状。
主要原理是使用高專一性的單株抗體直接結合到腫瘤細胞特有的蛋白質或是細胞激素，影響腫瘤細胞的生長、引起免疫系統反應或是其他功能。已經發展的藥物有針對乳癌的曲妥珠单抗和針對白血病的吉妥单抗在臨床使用。