Recovery from severe metabolic alkalosis with acute kidney injury due to gastric cancer: a case report.

Most cases of severe metabolic alkalosis have many causes that may result in renal failure and death. Therefore, these should be treated promptly for successful recovery. A 61-year-old man was hospitalized due to an acute kidney injury (creatinine level of 4.36 mg/dL) after a 3-month history of anorexia and recurrent vomiting. He had been treated for tuberculosis in the past. Blood gas analysis revealed severe metabolic alkalosis with pH=7.66, HCO=94 mmol/L, and pCO=82.0 mmHg. Routine biochemical examination revealed severe hypokalemia (K 2.9 mEq/L) that was associated with prolonged QTc interval (0.52 seconds) on the electrocardiogram. Gastrofiberscopic examination also revealed severe stenosis and ulcerated scarring of the gastric pylorus and severe esophagitis. Intravenous hydration and correction of hypokalemia improved renal function and resolved metabolic alkalosis. An investigation that was repeated after 6 days revealed a creatinine level of 1.58 mg/dL, pH=7.47, HCO=23.4 mmol/L, K=3.6 mEq/L, and QTc of 0.45 seconds. The patient underwent gastrectomy and adenocarcinoma was observed. We described a resolved case of severe metabolic alkalosis and acute kidney injury in a rural medical setting following conservative management.