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| Sulfonamide crystals form primarily in acid urine. The shape and color of these crystals are extremely variable, depending on the particular sulfonamide being administered to the patient. The most common forms encountered include rosettes, fan shapes and those resembling shocks of wheat. Sulfa crystals have pathologic significance, since they tend to form renal calculi that may damage renal tubules. (Brightfield microscopy, 160X magnification.) |
