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The bone mineral density (BMD) and the associated extracellular status of mineral and acid-base metabolism were evaluated in 11 males, 3–18 years after total gastrectomy (GX). In the lumbar spine, but not in the femoral neck, BMD was decreased in seven, normal in three, and falsely high in one individual. Relative to the limits of normalcy, fasting serum levels of gastrin were low, but normal for calcium, phosphorus, parathyroid hormone, calcitonin and vitamin D, while the level of total alkaline phosphatase was elevated; fasting urine pH and calcium were low, while phosphorus and net acid were high. Regression analyses revealed serum gastrin and phosphorus, and urinary net acid as possible predictors of BMD. It was concluded that over the long-term GX evokes low BMD, but not hyperparathyroidism and deranged vitamin D metabolites. Future studies may focus on gastrin, parathyroid hormone-independent hyperphosphaturia and disturbed acid-base metabolism as indicators of a new extra-cellular equilibrium of minerals.

clinical chemistry and laboratory medicine

Low Bone Mineral Density after Total Gastrectomy in Males: a Preliminary Report Emphasizing the Possible Significance of Urinary Net Acid Excretion, Serum Gastrin and Phosphorus