[Acute interstitial nephritis and uveitis: a recently recognized syndrome]

Area of Science:

• Nephrology
• Ophthalmology
• Immunology

Background:

• Acute interstitial nephritis (AIN) is an inflammatory kidney condition.
• Uveitis is inflammation of the eye's middle layer.
• The co-occurrence of AIN and uveitis in pediatric patients is rare.

Observation:

• A 14-year-old boy presented with fatigue, significant weight loss, glycosuria, and acute renal failure.
• Renal biopsy confirmed AIN with mononuclear cell infiltration; no specific etiology was identified.
• The patient initially responded well to prednisone therapy but later developed bilateral iridocyclitis (uveitis).

Findings:

• The patient experienced severe non-oliguric renal failure, proteinuria, and generalized aminoaciduria.
• Treatment with prednisone led to dramatic improvement in renal function.
• Recurrent uveitis developed, responding slowly to topical steroids, while nephritis did not recur.

Implications:

• This case adds to the limited reports of AIN associated with uveitis in pediatric patients.
• The syndrome's unknown etiology suggests a possible transient defect in cell-mediated immunity.
• Further research is needed to understand the pathogenesis and optimize management of this rare condition.