2nd August 2023

A 44-year-old man presents with a 3-day history of fevers

A 44-year-old man presents with a 3-day history of fevers. Before his onset of fevers, he describes having a red, itchy, painful nodule on his right forearm that appeared when he returned from his trip to Cape Town. On examination, there is evidence of posterior cervical lymphadenopathy, but the area where he describes having the lesion seems to have resolved. He shows you a picture which confirms the appearance of a chancre.

What is the most likely diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.