(of a growth) the quality of not being cancer and not being likely to be harmful

The doctors used both CT scans and mammography to help determine the malignancy or benignancy of the tumours. 医生们使用 CT 扫描和乳房 X 射线照相术来帮助确定肿瘤是恶性或良性。

We were relieved after the doctor called to confirm the benignancy of the mole on my arm.