Don't Overlook Syphilis: An Atypical Rash in a Woman With Neurologic, Ocular, and Otic Involvement

The manifestations of syphilis, a sexually transmitted infection caused by Treponema pallidum, can be divided into primary, secondary, or tertiary stages. In addition, syphilis can cause a latent infection with no clinical manifestations and be diagnosed solely by serologic testing. Secondary syphilis is especially known for causing a rash and diverse clinical manifestation which can make its diagnosis challenging - particularly in patients whose medical and sexual histories do not align with the classical epidemiologic and textbook description of secondary syphilis. We present a case of a 20-year-old immunocompetent heterosexual woman who presented with a rash atypical for secondary syphilis and accompanied by neurologic, ocular, and otic manifestations. This case highlights the importance of considering syphilis in the differential diagnosis of sexually active patients with a rash, even when their clinical presentations do not align with the textbook description of a syphilitic rash. Health care providers must remain vigilant for the diagnosis of syphilis in diverse clinical contexts, as early recognition and treatment are vital to prevent further syphilitic complications and transmission in military and civilian populations. Timely identification and intervention are crucial for both patient care and public health.