THE INCIDENCE AND DISTRIBUTION OF CILIA IN THE HUMAN PITUITARY WITH A DESCRIPTION OF MICRO-FOLLICULAR CYSTS DERIVED FROM RATHKE’S CLEFT

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Abstract
Ciliated epithelium, frequently accompanied by mucous cells, was noted in 19 of 100 human pituitaries. The youngest specimen was from a 2 day old male and the oldest from an 83 year old female. Cilia were common in cysts and to a lesser degree in cleft and follicles. The cysts were observed in 22 cases. Of these 9 were classified as micro-follicular, 8 as macro-follicular, 3 as cystic clefts, 1 as multilocular and 1 as a hypophyseal stalk cyst. The author believes that all areas with ciliated epithelia are derived from Rathke''s cleft.