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Institut de Médecine et de Chirurgie expérimentales, Université de Montréal, Montreal, Canada
Dietary supplements of dihydrotachysterol (DHT) and calcium acetate transform the parathyroids of the rat into sponge-like cystic organs. This lesion presumably represents "retention cyst" formation. It is tentatively ascribed to a selective blockade of the discharge of parathyroid secretion into the blood, without suppression of its formation within the gland. The advantages of the nutritional technique for the production of parathyroid cysts are discussed.
Manuscript received 23 April 1964.