are found in 1 to 2 persons per 1000 persons. This means many persons do have cystic kidneys but do not know it yet.
Usually cystic kidneys are harmless but are known to cause high blood pressure
, possible cysts in pancreas
, heart and brain. This is seen in Polycystic kidney
disease or Autosomal dominant variety. Your mother needs to discuss this with her Doctor and get required check ups for early diagnosis and prevention of any problems.
There is not a problem unless your mother has lost significant weight recently. Cancer may be a part of the differential diagnosis but less common, so not to worry.
Wishing good health.