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Review Question - QID 210983

Acute Tubular Necrosis Studies Urinalysis with microscopy and sediment analysis QID: 210983 (M1.OMB.18.4869)
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QID 210983 (Type "210983" in App Search)
A 56-year-old woman presents to the clinic complaining of fatigue and nausea. She was recently diagnosed with metastatic ovarian cancer and subsequently started treatment with an alkylating agent. The patient reports recent weight loss, malaise, and drowsiness, but denies fever, headaches, palpitations, shortness of breath, or genitourinary symptoms. Physical exam was unremarkable. Laboratory tests are shown below.

Serum:
Na+: 137 mEq/L
Cl-: 101 mEq/L
K+: 4.8 mEq/L
HCO3-: 25 mEq/L
BUN: 8.5 mg/dL
Glucose: 117 mg/dL
Creatinine: 2.1 mg/dL
Thyroid-stimulating hormone: 1.8 µU/mL
Ca2+: 9.6 mg/dL
AST: 8 U/L
ALT: 11 U/L

What findings on urinalysis are most specific to this patient’s diagnosis?

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