'malignancy' is an accepted and usable word in written English.
It is typically used to refer to a cancerous tumor or a tendency to be evil or harmfully malicious. An example sentence would be: "The malignancy of the tumor was too advanced for treatment."
The tumor, her doctors felt, was malignant (though it was probably an oligodendroglioma, of relatively low malignancy) and needed to be removed.
In "The Tin Drum", arguably the most celebrated German novel since 1945, Günter Grass used a cretinous young dwarf growing up in the Danzig of the 1930s as an emblem of Nazi malignancy.
From this image, the researchers can measure things such as the blood vessels' sizes and how they branch and thus how likely it is that a tumour is malignant.The ultimate aim is more ambitious: not just to detect malignancy, but also to measure the "aggressiveness" of that malignancy in other words, how likely a tumour is to metastasise (ie, to scatter offshoots into the rest of the body).
Certain occupations seemed to breed malignancy; chimney sweeps historically got cancer of the scrotum, dye manufacturers bladder cancer and wartime shipyard workers handling asbestos died from aggressive tumours of the membrane lining the chest.
The malignancy within the original constitution was the result of the need to have it ratified by the southern colonies.
Marek's disease, highly contagious, often fatal malignancy of chickens that affects the nerves and visceral organs and that is caused by a herpesvirus.
Aware of an inoperable malignancy in his throat, he resigned in May and was succeeded by Baldwin.
Brain tumours are the second most common malignancy of childhood (after leukemia); they are, nevertheless, very rare.
During 1972, however, Mao suffered a serious stroke, and Zhou learned that he had a fatal malignancy.
Testicular cancer represents only 1 percent of all cancers in males, but it is the most common malignancy for men between ages 15 and 35.
It is a malignancy of immature bone (osteoid) that was highly lethal before the use of anticancer drugs, which have increased the five-year survival rate to between 60 and 80 percent for individuals whose disease is localized.
