The synonym of non malignant is benign.
Malignant substance
The word malignant (evil, malicious) has the verb form "to malign" and the noun form "malignancy."
If it is not known whether a tumor is benign or malignant, it is sometimes referred to as as "mass".
The tests show that the tumor is malignant.
The effects of a brain tumor, malignant or non malignant are the same; seizures, balance issues and personality changes.
Its a malignant tumor.
Malignant would be the main answer, but another possible one is Cancerous.
The MRI of the patient is characteristic of malignant tumor. The malignant growth of the industries has spoiled the landscape.
A non-malignant sigmoid polyp is a noncancerous but abnormal cell that is present in the sigmoid colon (near rectum). Polyps are abnormal cells in the colon and some of them have the tendency to turn in to cancer with the passage of time. It is highly recommended to remove the non-malignant polyps.
Cancerous.
The tumor is malignant, which means cancerous, so I'll have to have it removed.
obtuse?