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Article
April 1976

Incomplete Distal Renal Tubular Acidosis in Hypomagnesemia-Dependent Hypocalcemia

Author Affiliations

From the Department of Internal Medicine, Bishop Clarkson Memorial Hospital, University of Nebraska College of Medicine, Omaha.

Arch Intern Med. 1976;136(4):462-466. doi:10.1001/archinte.1976.03630040064013
Abstract

Symptomatic hypocalcemia and hypomagnesemia, both responsive to replenishment of magnesium, occur in chronic alcoholism,1 malabsorption,2 experimentally induced magnesium deficiency,3 primary magnesium deficiency,4 and severe malnutrition.3,5 The cause of hypocalcemia in these conditions is unknown. Postulated mechanisms include decreased secretion or defective synthesis of parathyroid hormone6,7 or peripheral resistance to parathyroid hormone.4,8

I will describe two patients with hypocalcemia and hypomagnesemia who also had tetany, incomplete distal renal tubular acidosis, and increased concentrations of serum parathyroid hormone, all of which conditions responded to magnesium replenishment.

PATIENT SUMMARIES 

Patient 1.—  In 1954, a female patient developed diarrhea and abdominal pain. She was found to have regional enteritis, and a portion of small bowel was resected. In 1962, another portion of small bowel was resected because of acute intestinal obstruction. Two months later, the patient developed tetany and hypocalcemia and was treated with orally and intravenously

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