U.S. doctors online nowAsk doctors free
Dayton, OH
A 48-year-old female asked:

I had bladder cancer 10 yrs ago. simple cyst in left kidney was 3mm, now 8mm and read as complex. what is the probability of malignancy?

2 doctor answers3 doctors weighed in
Dr. Jason Kline
Nephrology and Dialysis 20 years experience
Possible.: Difficult to give you probability statistics in this setting, but any complex cyst requires close monitoring. With your history of bladder cancer, though, i encourage you to follow up with your urologist for his/her opinion. Malignancy unfortunately is not out of the question, but would be much easier to manage sooner rather than waiting until later. Best of luck to you.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Ed Friedlander
Pathology 45 years experience
Very good answer. Keep a close eye on that complex cyst
Feb 27, 2013
Dr. Richard Sarle
Urology 23 years experience
Renal cyst: Need to know bozniak classification of your cyst; 1 is simple 2-5 are complex, 3-5 are higher cancer risk and need removal. Grade 2 need regular monitoring.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Sep 28, 2016
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.