Renal ultrasonography to evaluate kidney size may provide useful information if urinalysis detects albuminuria (proteinuria), cylindruria, or microhematuria, or if serum creatinine is elevated (≥ 1.4 mg / dL [≥ 124 micromole / L] in men; ≥ 1.2 mg / dL [≥ 106 micromole / L] in women).