1
the malignancy of sth
此处 malignancy 为不可数名词，表示‘恶性’这一性质。
The malignancy of the tumor was confirmed by biopsy.
肿瘤的恶性已通过活检证实。
恶性
先理解核心含义，再看它在真实句子里的用法。
恶性
A malignant state; progressive, resistant to treatment, and tending to cause death.
The malignancy of the tumor was confirmed by biopsy.
肿瘤的恶性已通过活检证实。
恶性或患病状态。
The state of being malignant or diseased.
恶性肿瘤；特指任何侵袭性或非良性肿瘤。
A malignant cancer; specifically, any neoplasm that is invasive or otherwise not benign.
恶毒之物；邪恶、堕落、恶意。
That which is malign; evil, depravity, malevolence.
The biopsy confirmed that the tumor was a malignancy.
活检证实这个肿瘤是恶性的。
Early detection of a malignancy greatly improves the chances of successful treatment.
早期发现恶性肿瘤能大大提高成功治疗的机会。
The doctor explained that the malignancy had spread to other organs.
医生解释说恶性肿瘤已经扩散到其他器官。
此处 malignancy 为不可数名词，表示‘恶性’这一性质。
The malignancy of the tumor was confirmed by biopsy.
肿瘤的恶性已通过活检证实。
此处 malignancy 为可数名词，指‘恶性肿瘤’，复数形式为 malignancies。
The scan found a malignancy in his kidney.
扫描发现他的肾脏里有一个恶性肿瘤。
malignancies 是复数形式，表示多种恶性肿瘤。注意与不可数用法的区别。
Malignancies of the skin are often curable if caught early.
皮肤恶性肿瘤如果早期发现，往往是可以治愈的。
Not this
The biopsy revealed a malignancy tumor.
Use this
The biopsy revealed a malignant tumor.
malignancy 是名词，表示“恶性/恶性肿瘤”；修饰名词 tumor 时要用形容词 malignant。汉语里“恶性”可直接放在名词前，所以学习者容易把 malignancy 误当形容词用，但英语中名词作定语通常不表示这种性质，改为 malignant 后语法才正确。
Not this
He has malignancy in his lung.
Use this
He has a malignancy in his lung.
当 malignancy 表示“恶性肿瘤”时是可数名词，需要用不定冠词 a。汉语“他有恶性肿瘤”没有冠词，直译成英语容易漏掉 a；加上 a 才能明确指一个恶性肿瘤。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
发生恶性肿瘤
Smoking can increase the risk of developing a malignancy.
吸烟会增加发生恶性肿瘤的风险。
恶性肿瘤筛查
Regular malignancy screening is recommended for high-risk patients.
建议高危患者定期进行恶性肿瘤筛查。
转移性恶性肿瘤
The biopsy confirmed a metastatic malignancy.
活检证实为转移性恶性肿瘤。
潜在的恶性肿瘤
The doctor suspected an underlying malignancy.
医生怀疑存在潜在的恶性肿瘤。
恶性肿瘤诊断
Early diagnosis of malignancy greatly improves the chances of recovery.
恶性肿瘤的早期诊断可大大提高康复几率。
继发性恶性肿瘤
Treatment may rarely cause a secondary malignancy.
治疗极少会引起继发性恶性肿瘤。
Use malignancy naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 malignancy 拆成 mal（坏）+ign（火）+ancy，想象一团坏火在体内烧成恶性肿瘤，记住“恶”这个核心义。
语域：formal 常见场景：medical records、oncology discussions、pathology reports 该义项为医学术语，通常用于正式场合，如病历、肿瘤科讨论或医学文献；日常交流中较少使用。
None of the common words listed here is a perfect rhyme with malignancy (/məˈlɪɡnənsi/), because the stressed vowel and the following consonant differ. Pregnancy shares the -nancy spelling and the final /nənsi/, but its stressed vowel is /e/, not /ɪ/. Vacancy and infancy share only the -ancy spelling; urgency, currency, and tendency share only the -ency spelling, all pronounced /ənsi/ after different consonants. The uncommon word benignancy (/bɪˈnɪɡnənsi/) is a true rhyme.
Dictionary facts from ECDICT, WIKTIONARY.