The type of kidney lesion found determines the correct treatment, explains the Urology Care Foundation. Doctors may use the term "kidney lesion" to refer to a tumor, a cyst or another mass. While a benign kidney cyst may require no treatment, a malignant tumor may require surgery and other treatments to stop its growth.
A simple, benign kidney cyst may not affect kidney function and can sometimes even disappear without treatment, according to Mayo Clinic. However, a doctor may recommend regular ultrasounds to monitor its growth and look for any changes. If the cyst causes discomfort, the doctor may recommend treatment, such as drainage or removal.
Polycystic kidney disease, which causes multiple cysts, or lesions, to develop in the kidneys, doesn't have a cure, but patients typically benefit from symptom management, which may include pain and blood pressure medications and diuretics, states Healthline. In some cases, the patient may require surgery to drain the cysts. Advanced polycystic kidney disease may require dialysis or kidney removal.
Most malignant kidney tumors require treatment, although doctors sometimes recommend watchful waiting instead if the cancer is not aggressive, according to the American Society of Clinical Oncology. Doctors often surgically remove cancerous kidney tumors, along with a portion of the organ, surrounding tissue and lymph nodes. If the cancer spreads beyond the kidney lesion, doctors may also use any combination of targeted drug therapy, chemotherapy, radiation or immunotherapy as treatment.