### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I have recently gone through a general check up program whrein in the ultrasound it showed a 1.6 cm cyst in the right kidney . The consulting doctor says nothing to worry. Meanwhile I have been having mild backache for several days. The pain is also being experienced in the left side of my lower abdomen. My age is 59, female and have gone throught total hysterectomy few yrs back.. Kindly give me insight for the cause of thsi pain.

### output:

Hello welcome to ChatDoctorRenal cysts is a fluid collection in the kidney. The Majority of renal cysts are benign and can be monitored without any treatment. However, some are malignant and have to be removed by surgery. Simple renal cysts are found frequently in the elderly. The renal cysts have been classified into five categories by Bosniak Category I: benign simple cyst without septa, calcification or solid component. Category II:Benign cyst with few thin septa and contain fine clarifications Category IIF: Well marginated with a number of thin septa with thick nodular calcification and >3cms in size. Category III: Indeterminate cystic masses with thick septa with enhancement. Category IV: Malignant cystic masses with thick septa with enhancement and irregular marginsSometimes a CT scan is needed to distinguish between simple and malignant certain in the cyst may be due to hemorrhage or abscess with in the cyst, or it enlarges to compress other organs. The pain you might be having may be due to some other cause as it is on left side too or due to Tight your urine checked. Hope I have answered all your queries. Wish you Good Health