Report of a Dog Maintained in Good Health by a Parathyroid Autograft Approximately One Fourth of a Millimeter in Diameter and Comments on the Development of the Operation for Graves' Disease as Influenced by the Results of Experiments on Animals

In a paper on the autoand isotransplantation, in dogs, of the parathyroid glandules, a the histories of two of the dogs (Nos. 8 and 9) reported in the series of experiments were incomplete, the animals having been kept for further study. One of these dogs (No. 9) was observed for fifteen months and was in good health until the performance of the final operation at which a parathyroid autograft too small to be visible 2 to the naked eye was removed (figures I and 2). The death of the dog from hypoparathyroidism occurred about three months after the removal of the tiny transplant which was only o.2 5 of a millimeter in one diameter and little more than this in the other.