malignantly  
adverb uk/məˈlɪɡ.nənt.li/ us/məˈlɪɡ.nənt.li/
  (DISEASE)      
  恶性地
in a way that is related to cancer and is likely to be harmful
  Fat can make a healthy cell malignantly transform into a tumour cell. 脂肪可以使一个健康的细胞恶性转化为肿瘤细胞。 
 Pigmentation cells that proliferate malignantly cause cancer.  恶性增殖的色素细胞会导致癌症。 
 - More examples
 - A lesion will appear to be raised on the surface of the skin as it malignantly evolves on the outer ear.
 - In patients with multiple myeloma, the plasma cells in the bone marrow start proliferating malignantly.
 - This cell self-destruction program is activated when cells are no longer functional or are even developing malignantly.
 
  (EVIL)      
 formal恶意地;邪恶地 
in a way that shows a strong wish to do harm
  She laughed malignantly. 她恶毒地笑了。 
 These politicians are malignantly corrupt. 这些政客是恶性腐败的。 
 See: malignant
 - More examples
 - He lied malignantly.
 - He verbally attacked his opponent for no reason other than to malignantly smear his reputation.