“…In the latter two conditions, retention of infused calcium was normal or greater than normal. The authors suggested that this indicated an admixture of osteoporosis and osteomalacia, a possibility also supported by their observations of frequent elevation of serum alkaline phosphatase, findings also supported by others (526,525). Although similar results with calcium infusion tests were obtained by other workers in patients with Cushing's syndrome, patients with postmenopausal osteoporosis were unable to retain calcium by the techniques used (301).…”