By the way, doctor: Should I be worried about a kidney cyst?
Q. Recently, I had a pelvic ultrasound to evaluate uterine fibroids. During the procedure, the radiologist found a cyst in one of my kidneys. Should I be concerned about kidney cancer?
A. Kidney (or renal) cysts are small, fluid-filled sacs in the kidneys; they're usually harmless and rarely cause symptoms. Such cysts are quite common, and many people have them without knowing it. The likelihood of having one or more cysts increases with age — from 5% of people in their 30s to more than 36% of those in their 70s. In most cases, cysts are discovered incidentally during an ultrasound, CT scan, or MRI scan for some other health reason.