Empty Sella Syndrome (ESS) is a disorder that involves the sella turica, a bony structure at the base of the brain that surrounds and protects the pituitary gland. ESS is a condition that is often discovered during tests for pituitary disorders, when radiological imaging of the pituitary gland reveals a sella turica that appears to be empty. There are two types of ESS: primary and secondary. Primary ESS happens when a small anatomical defect above the pituitary gland increases pressure in the s...

Levonorgestrel (or '-norgestrel or -norgestrel''') is a synthetic progestogen used as an active ingredient in some hormonal contraceptives.

Empty Sella Syndrome as related to Levonorgestrel