Genital ulcers could be one of many sexually transmitted diseases or an infection that is not transmitted by sex. An expert walks you through a case. This is the first of a three-part series on ...

In a retrospective single-center series, condyloma lata, a manifestation of secondary syphilis, showed a consistent histopathologic pattern on routine hematoxylin and eosin stain, including ...

A 32‑year‑old man presented with a persistent sore on his lower lip that had lasted three weeks and failed to respond to topical antibiotic cream. Strikingly, the ulcer caused no pain. He denied any ...

During its second stage, syphilis may lead to a rash on one or several parts of the body. It most commonly affects the trunk, palms of the hands, and soles of the feet. The rash typically does not ...

Why has this asymptomatic man in his 60s with an unremarkable medical history suddenly developed gray-white plaque on his soft palate? That's the question facing Jianjun Qiao, MD, PhD, of Zhejiang ...

Ancient remains from Vietnam suggest diseases like yaws may have been passed from mother to child thousands of years ago, a ...