[Acute tubulointerstitial nephritis in children]

Area of Science:

• Pediatric Nephrology
• Renal Pathology
• Internal Medicine

Context:

• Acute tubulointerstitial nephritis (ATIN) is a rare renal disorder in children, often presenting with non-specific symptoms that can delay diagnosis.
• The condition can be triggered by infections or drugs, or occur without a clear cause.
• Early identification and appropriate management are crucial for a favorable outcome.

Purpose:

• To describe the clinical and laboratory findings in 21 pediatric patients with ATIN.
• To highlight typical features that aid in the early recognition of this potentially reversible renal disease.
• To analyze the course and prognosis of ATIN in the pediatric population.

Summary:

• The study observed 21 children (aged 7-16) with ATIN, including 8 with TINU syndrome.
• Common symptoms included fatigue, fever, and gastrointestinal issues, with all patients exhibiting non-oliguric acute renal failure and abnormal urinalysis.
• Causes were identified as infection in 8 patients and diclofenac in one; 4 patients and those with TINU syndrome had unknown etiology.
• Renal function fully recovered in all patients, with a mean recovery time of 47 days.

Impact:

• Provides insights into the diverse clinical presentations of ATIN in children.
• Emphasizes the importance of early diagnosis for preventing long-term renal damage.
• Contributes to understanding the favorable prognosis of ATIN in children when recognized and treated promptly.