Lab test interpretation

Cystine Crystals in Urine Sediment in Cystinuria

Characteristic hexagonal cystine crystals in acidic urine sediment: microscopic features, formation mechanism, and clinical significance in cystinuria.

Microscopy of urine sediment: typical hexagonal cystine crystals
Microscopy of urine sediment: typical hexagonal cystine crystals

🔬Cystine crystals in a human urine sample. ✅Cystine crystals are flat, colorless plates of a characteristic hexagonal shape with equal or unequal sides. ✅They appear in acidic urine, which is associated with hereditary diseases. The presence of cystine crystals indicates a defect in proximal tubular amino acid reabsorption.