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.
A cerebrospinal fluid leak is a condition when the fluid contained in the spinal column and brain leaks out of its confined space. This can be caused by several reasons, including spontaneous cerebrospinal fluid leak, following a procedure such as a spinal tap (lumbar puncture) or trauma. Common symptoms.