Review Question - QID 210500

A 49-year-old woman presents to the emergency room with bloody stool and malaise. She developed a fever and acute left lower quadrant abdominal pain earlier in the day. She has had 2 bowel movements with bright red blood. Her past medical history is notable for hyperlipidemia, hypertension, and diabetes mellitus. She takes lovastatin, hydrochlorothiazide, metformin, glyburide, and aspirin. Her temperature is 102.9°F (39.4°C), blood pressure is 101/61 mmHg, pulse is 110/min, and respirations are 22/min. On exam, she is fully alert and oriented. She is tender in the left lower quadrant. A computerized tomography (CT) scan is performed demonstrating acute diverticulitis. She is admitted and started on broad-spectrum antibiotics. 48 hours later, her urine output is significantly decreased. Her abdominal pain has improved but she has started vomiting and appears confused. She has new bilateral lower extremity edema and decreased breath sounds at the lung bases. Laboratory analysis upon admission and 48 hours later is shown below:

Admission:
Hemoglobin: 11.9 g/dl
Hematocrit: 34%
Leukocyte count: 11,500/mm^3
Platelet count: 180,000/ mm^3

Serum:
Na+: 141 mEq/L
Cl-: 103 mEq/L
K+: 4.5 mEq/L
HCO3-: 23 mEq/L
BUN: 21 mg/dL
Glucose: 110 mg/dL
Creatinine: 0.9 mg/dL

48 hours later:
Hemoglobin: 10.1 g/dl
Hematocrit: 28%
Leukocyte count: 11,500 cells/mm^3
Platelet count: 195,000/ mm^3

Serum:
Na+: 138 mEq/L
Cl-: 100 mEq/L
K+: 5.1 mEq/L
HCO3-: 24 mEq/L
BUN: 30 mg/dL
Glucose: 120 mg/dL
Creatinine: 2.1 mg/dL

Which of the following findings would most likely be seen on urine microscopy?