What are these cysts?
Is their growth to be malignant?
Will I get any problems with it in future?
The key points in answering those three questions lie in assuring this cyst belongs to which kind of diseases, simple cysts, multiple cysts or Polycystic Kidney Disease (PKD). As this patient has had middle renal insufficiency, the cyst might be caused by Polycystic Kidney Disease if he or she has no other kidney diseases, but it still needs some other tests to assure.
Polycystic Kidney Disease
If it belongs to PKD, a kind of hereditary disease, this patient may have one or several relatives with PKD. With genetic flaw, urine is easily blocked in the joint of renal tubules and renal collecting ducts, promoting cells of this part proliferating and causing cysts. As cysts grow, other renal tissues will be squeezed to open renal fibrosis and lose their functions. The person with PKD is destined to have its symptoms on exertion. Without effective treatments, renal insufficiency and the End Stage Kidney Failure will occur sooner or later. Therefore, the cysts of PKD can not be malignant like cancer but their growth will bring Kidney Failure to the patients.
Simple cysts and multiple cysts
Both diseases have no relationship with genes. With unknown pathogenesis, most scholars attribute it to acquired wound, infection or cancer. Generally, they will not arouse severe symptoms. Those cysts are probably cured, for its cysts will not proliferate malignantly. They will not bring serious damages to renal intrinsic cells, so renal insufficiency or Kidney Failure usually can not be found among patients with Simple cysts or multiple cysts. Since the scan proves those cysts are benign, this cyst can not be kidney cancer, for benign cysts can be distinguished from cancer by their appearance in the scan.
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