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BONUS

A 15-year-old boy comes to the office for a sports participation physical examination. He has been playing in a summer basketball league and now wants to try out for the high school team. His last physical examination was 2 years ago and, according to him, he has been healthy except for a cold 2 weeks ago. Before you begin the physical examination, the nurse informs you that his routine urinalysis shows: Color Tea-colored/dark; WBC 7/hpf; Specific gravity 1.030; RBC >100/hpf, a few red celi casts pH 5.5; Bacteria -negative; Protein - 2+; glucose - negative; Ketones - negative. These laboratory results are most indicative of which of the foliowing?

A.    Cystitis

B.    Glomerulonephritis

C.    Nephrotic syndrome

D.    Pyelonephritis

E.    Renal całculi