Cystic renal involvement in tuberous sclerosis

Area of Science:

• Medical Genetics
• Pediatric Nephrology
• Neurology

Background:

• Tuberous sclerosis is a genetic disorder characterized by the growth of hamartomas in multiple organs.
• Cystic renal involvement in tuberous sclerosis can be mistaken for other renal diseases, complicating diagnosis.

Observation:

• Two cases of tuberous sclerosis with atypical cystic renal presentations are detailed.
• One patient, a young male, was initially misdiagnosed with adult-type polycystic kidney disease before neurological symptoms suggested tuberous sclerosis.
• Another patient, an adolescent female with known tuberous sclerosis, experienced accelerated renal failure with cystic kidney lesions.

Findings:

• Computerized tomography (CT) of the brain revealed periventricular calcifications, confirming tuberous sclerosis in the misdiagnosed patient.
• Abdominal CT scans identified cystic lesions in the kidneys of both patients.
• The study highlights the diagnostic utility of brain CT in pediatric cases with cystic renal disease and no family history.

Implications:

• Early and accurate diagnosis of tuberous sclerosis is vital for timely management and intervention.
• Neuroimaging (CT scan) of the brain is recommended for children presenting with cystic renal involvement and suspected tuberous sclerosis.
• Abdominal imaging (CT or ultrasound) can differentiate cystic renal lesions from angiomyolipomas in tuberous sclerosis patients.