(BMJ)—A 57-yo nonsmoking man w/ no PMHx presented w/ fatigue, recurrent sore throat, and a persistent “cold sore” x3mo. Exam: irregular, indurated ulcer on R oral commissure; palpable swelling in R submandibular triangle. What is the dx?
Ecthyma gangrenosum
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Behçet syndrome
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Squamous cell carcinoma
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Primary syphilis
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Herpes labialis
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