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Thomas E. Lad, MD; Daniel H. Shevrin, MD; Subhash C. Kukreja, MD
Chicago

Arch Intern Med. 1987;147(7):1361.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Heiselman and Bennett both suggest that cisplatin-induced hypomagnesemia may be the mechanism for the observed reduction in serum calcium levels in our hypercalcemic patients. Cisplatin therapy does induce hypomagnesemia, which, in turn, inhibits parathyroid hormone secretion and action, thus resulting in hypocalcemia.¹ We had initially considered this possibility and had obtained serum magnesium and parathyroid hormone levels before and after cisplatin administration in six patients (patients 1, 2, 3, 8,10, and 11 in Table 2 of our article).2 Supplemental magnesium was not given. The posttreatment measurements were made either the day serum calcium decreased to a value below 2.87 mmol/L (11.5 mg/dL) or on day 7. The results are shown in the accompanying Table. As expected, serum magnesium levels decreased significantly with cisplatin treatment. There was, however, no relation between hypomagnesemia and decrease in serum calcium levels, eg, serum magnesium drop was the greatest in patient 10, yet there was . . . [Full Text PDF of this Article]

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