title: Refractory rickets caused by mild distal renal tubular acidosis.
abstract: Type I (distal) renal tubular acidosis (RTA) is a disorder associated with the failure to excrete hydrogen ions from the distal renal tubule. It is characterized by hyperchloremic metabolic acidosis, an abnormal increase in urine pH, reduced urinary excretion of ammonium and bicarbonate ions, and mild deterioration in renal function. Hypercalciuria is common in distal RTA because of bone resorption, which increases as a buffer against metabolic acidosis. This can result in intractable rickets. We describe a case of distal RTA with nephrocalcinosis during follow-up of rickets in a patient who presented with clinical manifestations of short stature, failure to thrive, recurrent vomiting, dehydration, and irritability.
authors.affiliation: Department of Pediatrics, Chungbuk National University College of Medicine, Cheongju, Korea.
authors.forename: Ji-Ho
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of Pediatrics, Chungbuk National University College of Medicine, Cheongju, Korea.
authors.forename: Joo Hyun
authors.initials: JH
authors.lastname: Park
authors.affiliation: Department of Pediatrics, Chungbuk National University College of Medicine, Cheongju, Korea.
authors.forename: Tae-Sun
authors.initials: TS
authors.lastname: Ha
authors.affiliation: Department of Pediatrics, Chungbuk National University College of Medicine, Cheongju, Korea.
authors.forename: Heon-Seok
authors.initials: HS
authors.lastname: Han
keywords: Distal renal tubular acidosis; Nephrocalcinosis; Rickets