Another Hard Question

A 65 year-old male presents with a 4-6 month history of intermittent production of red-tinged urine. Physical exam
reveals a well nourished patient with slightly enlarged prostate and no other abnormal findings.

Initial laboratory data reveals:

-hemoglobin 18.7 g/dl (normal: 13.0-18.0 g/dL)
-hematocrit 58% (normal: 37-49%)
-BUN 10 mg/dl = urea of 3.6 mmol/L (normal: 8-25 mg/dL or 2.9-8.9 mmol/L)
-creatinine 0.8 mg/dl = 70 μmol/L (normal: 0.6-1.5 mg/dL or 52-132 μmol/L)
-calcium 12.3 mg/dl = 3.1 mmol/L (normal: 8.5-10.5 mg/dL or 2.1-2.6 mmol/L)
-urinalysis: ++ hematuria, + PMN.

The patient's lab results are most consistent with which of the following?

A. Dehydration
B. Paraneoplastic syndrome
C. Renal hematoma
D. Cystitis secondary to E. coli
E. Renal calculi

??????