Doctors in Belgium met with a real head-scratcher when an 83-year-old married man came in with a rare form of secondary syphilis—the second of four stages of the sexually transmitted bacterial ...

Syphilis is a curable infection caused by the bacteria Treponema pallidum. In its primary stage, syphilis causes painless sores called chancres that make the infection most contagious. If untreated, ...

Common STIs that cause rashes include genital herpes, HPV (genital warts), syphilis, chlamydia, and gonorrhea. Early testing and treatment are crucial to manage symptoms, prevent complications, and ...

Anders Sangesland is a specialty registrar in rheumatology. The author has completed the ICMJE form and declares no conflicts of interest. Neurosyphilis is a rare cause of vision loss that can mimic ...