What Is a Cyst?
6. Renal Cyst
A renal cyst is a cyst found in or on the kidney. It is generally a fluid collection that is benign and only requires observation without the need for invasive treatment. Renal cysts that are suspected to be malignant or cancerous are usually removed through a surgical procedure known as nephrectomy.
Multiple renal cysts can be seen in cystic kidney diseases such as medullary sponge kidney and polycystic kidney diseases. The classification of the risk of malignancy can be done using the Bosniak Classification System, which divides the renal cysts into five groups. A complex cyst can be evaluated using a contrast computed tomography (CT) scan, contrast enhanced ultrasound, or doppler ultrasonography. Treatment depends on the type of renal cyst.
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