Pituitary Gland, Rathke's Cleft - Dilation - Gallery

Pituitary, Rathke�s cleft - Dilation in a female F344/N rat from a chronic study. The dilated Rathke�s cleft is filled with intensely eosinophilic proteinaceous material with cholesterol clefts (arrow) present at the edge of the dilated cleft.