NPPB and Abnormal renal physiology: Laboratory findings revealed mild renal dysfunction [creatinine 1.03 mg/dL (0.60–1.20 mg/dL), blood urea nitrogen 34.4 mg/dL (7–20 mg/dL)] and fluid retention [brain natriuretic peptide (BNP) 547.6 pg/mL (<18.4 pg/mL)].