“…In favour of the first theory: (1) Secondary hyperparathyroidism with hyperplasia has been found on exploration of parathyroid glands (Linder and Vadas, 1931 ;Highman and Hamilton, 1936;Albright et al, 1937). 2Poor absorption of calcium and phosphorus has been found by Albright and Reifenstein (1948) and by Saville et al (1955) and is clearly shown in the balance data of our case.…”