tumor: is applicable to any such growth on or in the body of a person, animal, or plant and to various other enlargements: removed a benign ~ from his skull.     肿瘤tumor是正常细胞由于增生和分化异常，而形成的新生物(neoplasm是下一个词)，常表现为肿块，肿块的概念更大些           词根BEN表示good,well好，反义词根是本组第三个词的MAL表示bad坏


neoplasm: is likely to replace tumor, especially in technical use, when reference is to a more or less unrestrained growth of cells without evident function or to a mass formed by such growth: identified the growth as a ~.      technical专业的


malignancy: applies to a neoplasm that because of unrestrained proliferation and tendency to invade tissues constitutes a menace to life: X rays revealed a ~ in the lung.       （tissue有2个意思  1、生物组织the material that forms in a plant or animal构成生物体各部分的物质，如muscle/brain/nerve/scar tissue肌肉/大脑/神经/疤痕组织   2、面巾纸纸巾a piece of soft and thin paper used especially for cleaning，如she wiped her nose with a tissue用面巾擦鼻子，如blow your nose with a tissue用纸巾醒鼻子）        menace威胁，强调敌意和令人警惕


cancer: is the usual popular and technical term for a malignant neoplasm: kept her worries about the ~ to herself.


tumor肿瘤: 常泛指任何增生肿块，neoplasm新生物: 多用于专业文章，指多余的增生肿块，malignancy恶性肿瘤: 指无节制扩散，侵犯周围组织，威胁生命的新生物cancer癌症: 词义同上，既是日常用语也是专业用语


记忆方法: 1）首字母TNMC推拿触摸<==查肿瘤的方法之一

              2）肿瘤的意思是身体组织异常增生的多余物mean an abnormal growth or mass of tissue.