Abstract
ObjectivesSyphilis is a sexually transmitted infection (STI) caused by treponema pallidum. Its rash usually affects the trunk and limbs extensively, including the palms and soles of the feet. Secondary syphilis confined to the face is extremely rare. MethodsWe report a case of annular rupioid secondary syphilis, which was misdiagnosed as verruca vulgaris. ResultsThe patient's lesions were confined to the face and resembled oyster shells. Her serological tests results were positive for treponema pallidum particle agglutination assay (TPPA) and rapid plasma reagin (RPR) (1:64). ConclusionAccording to epidemiological history, clinical presentation, non-treponemal tests, treponemal tests, and effective benzathine penicillin G treatment, confirmed secondary syphilis.
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