Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Empty Sella Syndrome ?
    ### Response:
    Empty Sella Syndrome (ESS) is a disorder that involves the sella turcica, a bony structure at the base of the brain that surrounds and protects the pituitary gland. ESS is often discovered during radiological imaging tests for pituitary disorders. ESS occurs n up to 25 percent of the population.
    