Diabetes mellitus Quiz: Ace Your Exams

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A 58-year-old man comes to the clinic complaining of painful lesions on his penis. Five days ago, he noticed the gradual onset of redness and tenderness over the glans and foreskin of the penis, which was associated with itching and a white, curd-like coating. The patient has a history of six urinary tract infections treated with antibiotics over the past year. Family history is significant for prostate cancer in the patient’s father. The patient’s temperature is 37.0°C (98.6°F), pulse is 80/min, respirations are 20/min, and blood pressure is 145/90 mmHg. BMI is 42 kg/m2. Physical examination shows symmetrically descended, non-tender testes. Penile examination shows the following:  



Reproduced from: Wikimedia Commons 

Which of the following laboratory studies is most likely to be elevated in this patient?  

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