Ct shows complex kidney cyst is 6cm is iif. but my dr wants another ct in dec i can't have mri as i have brain clip. should i wait?

Renal cyst: You can have ultrasound for renal cyst periodically like 2-3 months. Discuss with your doctor who knows your medical history well. Good luck.

Too little info: Not stated what "iif" means. Cannot say but good quality ultrasound (make sure you see, understand & keep copies of the images) generally works quite well/better, is safer, less expensive & the metal of the vascular clip is not a problem. Keep in mind your primary-medical-decision-maker/the-one-who-lives with-results-of-all-decisions/actions; no one else has same vested interest.