A<unk>  is a fluid collection in the kidney. There are several types based on the Bosniak classification. The majority are benign, simple<unk> s that can be monitored and not intervened upon. However, some are cancerous or are suspicious for cancer and are commonly removed in a surgical procedure called nephrectomy.
Numerous<unk> s are seen in the<unk> ic kidney diseases, which include polycystic kidney disease and medullary sponge kidney.
Renal cyst
Kidney abscess
Glomerulonephrosis
Cystic nephroma
Renal oncocytoma
Hydronephrosis
Testicular cyst
Medullary sponge kidney