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.
When this fluid leaks from the brain or spinal cord, it is called a cerebrospinal fluid leak, or CSF leak. When the fluid leaks, the pressure around the brain and spinal cord drops.t the Yale Sinus and Allergy Program, we are specialists in treating cerebrospinal fluid leaks and the symptoms associated with them. Cerebrospinal fluid is a clear, colorless fluid that surrounds the spinal cord and brain.