Kidney Stones, also known as renal calculi, are hard masses that separate urine from the urinary tract. These stones can occur anywhere in the urinary tract, including the kidneys, bladder, ureters and urethra.
This fluid is called the cerebrospinal fluid (CSF). When it leaks out, the pressure around the brain and spinal cord drops. Causes of leakage through the dura include: 1  Certain head, brain, or spinal surgeries.  Head injury.
Some changes are caused by arthritis of the spine. CSM is the most common spinal cord problem in people 55 years and older in the United States. If CSM is not treated, it will usually stay the same or get worse.There's no way to tell ahead of time if it will get worse or not.ome changes are caused by arthritis of the spine. CSM is the most common spinal cord problem in people 55 years and older in the United States. If CSM is not treated, it will usually stay the same or get worse.