癌症的英文cancer，医学临床上对于癌症的缩写都写成CA、Ca就是cancer的缩写
cancer
英 [ˈkænsə(r)] 美 [ˈkænsər]
n.癌;癌症;(迅速蔓延的)邪恶;(社会)毒瘤。
参考例句：
Although Connie was in the final stages of her fight against cancer, she was alert and cheerful.
虽然康尼处于和癌症搏斗的晚期，但她仍然神智清醒，精神愉快。
Exposure to low-level radiation for a long time may accelerate aging and cause cancer.
长期暴露在低水平辐射下可能会加速人的老化并引起癌症。
It is artificially induced (usually with ice baths) for certain surgical procedures and cancer treatments.
在进行某些外科手术时，在控制某些癌症时，均可人工降低体温(常采用冰浴)以降低对氧的需要。
He is suffering from terminal cancer.
他患晚期癌症。
cancer的近义词：
1、sickness
英 [ˈsɪknəs] 美 [ˈsɪknəs]
n.疾病;不健康;…病;…症;恶心;呕吐。
There appears to be another outbreak of sickness among seals in the North Sea.
看来北海的海豹又要爆发另一场疾病了。
2、rot
英 [rɒt] 美 [rɑːt]
v.(使)腐烂，腐败变质。
n.腐烂;腐败变质;形势恶化;废话;胡说。
In many schools, the rot is beginning to set in. Standards are falling all the time
很多学校的情况正开始变得越来越糟，教学水平一路下滑。
小熊爱兔兔
