Male patient presents with nausea, muscle pain, fatigue, and excessive urination. Note: specific gravity in this case has been tested more than once. It has remained fixed at 1.010

Urinalysis Results:

Chemical:

Color	Yellow
Appearance	Hazy
Specific gravity	1.010
pH	6.5
Protein	> 2000mg/dL
Glucose	Neg
Ketones	Neg
Bilirubin	Neg
Blood	Small
Urobilinogen	Normal
Nitrite	Neg
Leukocytes	Small

Microscopic:

RBCs: 10-20/hpf
WBCs: 2-5/hpf
granular casts: 10-20/lpf
renal epithelial cells: 5-10/hpf
red blood cell casts: 10-20/lpf


Question 1:  What is the most probable disease for this patient?