The major concern with renal cysts is telling them from more serious diseases, such as polycystic kidney disease, complex cysts, and solid masses (such as a cancer or abscess - a localized walled off infection). Ultrasonography, CT scanning, and/or MRI can be used to help establish the correct diagnosis. There are typical appearances for each of these on those tests, like the CT and ultrasounds that you had. Cystoscopy is not used to follow these.
polycystic kidney disease happens on both sides
cancer looks like this on CT:
- Thickened, irregular walls
- Thickened or enhanced septae within the mass
- Enhancement of the lesion after intravenous contrast
- A multilocular mass