Maternally inherited diabetes and deafness (MIDD) syndrome with m.3243A>G mutation associated with renal failure — a case report

Abstract

Maternally-inherited diabetes with deafness (MIDD) is a rare form of monogenic diabetes that results, in most cases, from an A-to-G transition at position 3243 of mitochondrial DNA (m.3243A>G). The clinical presentation of m.3243A>G mutation is variable, ranging from mild to severe phenotypes. Diabetes is often accompanied by sensorineural deafness, cardiomyopathy, neuromuscular, psychiatric disorders, macular dystrophy and renal failure (kidney manifestations in adults presenting with this mutation remain poorly defined). The study presents a case of a 40-years-old woman with a history of bilateral sensorineural deafness, renal failure and diabetes that was diagnosed due to increasing muscle weakness during exercise. MIDD was diagnosed based on the clinical picture and the results of laboratory studies including genetic testing. As far as we know, glomerulopathy with incomplete distal renal tubular acidosis has never been described before as a cause of renal failure in MIDD patients.