Cystine calcium bladder calculus in a 2-year-old child

Area of Science:

• Pediatric Nephrology
• Urology
• Nutritional Science

Background:

• Urinary tract infections (UTIs) can be associated with urolithiasis.
• Dietary factors, including calcium and vitamin D intake, play a role in stone formation.
• Cystinuria is a rare genetic disorder causing cystine stones.

Observation:

• A 2-year-old child presented with a UTI and a large bladder stone.
• The child had a daily intake of 2 gm calcium and vitamin D supplements.
• Urinary analysis confirmed cystinuria.

Findings:

• High dietary calcium and vitamin D intake may have contributed to early cystine calcium stone formation in this patient.
• The presence of cystinuria indicates a metabolic predisposition to stone disease.

Implications:

• Early diagnosis and management of cystinuria are crucial.
• Dietary counseling regarding calcium and vitamin D intake is important for children with or at risk for urolithiasis.
• This case highlights the potential interaction between high-dose supplements and underlying metabolic conditions.