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Abstract
Protein-losing enteropathies were diagnosed in two dogs that were initially presented with diarrhoea and weight loss. Plasma biochemistry in both cases revealed low concentrations of albumin, calcium and ionised calcium. Both dogs had an elevated plasma parathyroid hormone concentration and low serum 25-hydroxyvitamin D (25[OH]D) concentration. The first dog was diagnosed with lymphangiectasia on postmortem examination, and the second dog was diagnosed with chronic lymphocytic/ plasmacytic enteritis and severe cystic mucoid changes based on endoscopic duodenal biopsies. While a causal effect was not demonstrated, the protein-losing enteropathies may have caused reduced intestinal absorption of vitamin D leading to low plasma concentrations of ionised calcium and secondary hyperparathyroidism. To the authors' knowledge, this is the first report of low ionised calcium concentrations, low 25(OH)D and 1,25-dihydroxyvitamin D concentrations, and high parathyroid hormone concentrations in dogs with protein-losing enteropathies.
Published Version
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