A 77-year-old woman is brought to emergency by her husband after he found her on the floor by the staircase in their house. Vitals are within normal limits. Urinalysis shows:
Protein None
Blood 3+
WBC 0-2/hpf
RBC 3-4/hpf
Which of the following is the most likely explanation for this patient’s presentation?
Acute glomerulonephritis
Glomerulosclerosis
IgA nephropathy
Interstitial nephropathy
Nephrotoxicity