Diabetes Mellitus USMLE Step 1 Practice Question
A 13-year-old boy presents with polyuria, polydipsia, and nocturia over 2 months with 4-kg weight loss. Vital signs show BP 118/76 mmHg, HR 92 bpm, RR 18/min, temperature 37.2°C, and SpO2 98% on room air. Fasting glucose is 312 mg/dL with positive anti-glutamic acid decarboxylase antibodies. Urinalysis shows no ketones. He takes no chronic medications. Which of the following is the most likely diagnosis?
Answer choices
- AType 1 diabetes mellitusCorrect answer
- BDiabetes insipidus
- CCushing syndrome
- DMaturity onset diabetes of the young
- EType 2 diabetes mellitus
- FThyroid storm with secondary hyperglycemia
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