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.
Cervical Spine Injury. Cervical spine injuries ranging from serious to catastrophic can be a cause of sudden death in athletes competing in both contact and non-contact sports. Although the incidence rate is low this type of injury has a very high fatality rate.