What is (are) Solitary Kidney ?
When a person has only one kidney or one working kidney, this kidney is called a solitary kidney. The three main causes of a solitary kidney are
                
- birth defects. People with kidney agenesis are born with only one kidney. People born with kidney dysplasia have both kidneys; however, one kidney does not function. Many people with kidney agenesis or kidney dysplasia do not discover that they have a solitary kidney until they have an x ray, an ultrasound, or surgery for an unrelated condition.  - surgical removal of a kidney. Some people must have a kidney removed to treat cancer or another disease or injury. When a kidney is removed surgically due to disease or for donation, both the kidney and ureter are removed.  - kidney donation. A growing number of people are donating a kidney to be transplanted into a family member or friend whose kidneys have failed.
                
In general, people with a solitary kidney lead full, healthy lives. However, some people are more likely to develop kidney disease.