Thrush is a type of fungal infection. It occurs in your mouth and throat. Thrush does not usually affect healthy adults. It is more common in people with impaired immune systems. It is also more likely in those who take certain kinds of medicines.
Rathke cleft cysts are noncancerous fluid-filled growths that develop between the parts of the pituitary gland at the base of the brain. They develop while a baby is growing in the uterus. A Rathke cleft cyst develops from a piece of the fetus' developing Rathke pouch, which ultimately becomes part of the pituitary gland.