688 



LEWELLYS F. BAKKEK 



quickly and better if a previous defect has been created. In his opinion, 

 however, complete lack of parathyroids not only lessens the chances of the 



graft taking, but may prevent its taking en- 

 tirely. No experimenter, he says, has thus far 

 succeeded in making an implanted graft of 

 parathyroid grow in a case of tetany appearing 

 after total parathyroidectomy. Though Hal- 

 sted had maintained that isotransplantation 

 never succeeds anyway, and that, further, when 

 several parathyroids are autotransplanted, not 

 more than one will grow, Biedl assevers 

 strongly to the contrary, at least as far 



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Fi*,'. 17. Parathyroid autograft, appr9ximately % of a millimeter in diameter, 

 which prevented tetany in a dog- for 15 months. Three months after the removal of the 

 tiny transplant the death of the dog occurred from hypoparathyroidism. (After W. S. 

 II aisled, .1. Kxp. Mod., 1912.) 



as functionation and anatomical integrity for a limited time are con- 

 cerned. He has, he asserts, several preparations of "foreign" parathy- 

 roids that, after implantation into the spleen or the abdominal muscles, 

 had remained functionally active for from several weeks to several months; 

 they present the picture of normal parathyroid tissue, showing signs of 



