July 2023 in “Indian Journal of Sexually Transmitted Diseases and AIDS” "Moth-eaten alopecia" can be a sign of secondary syphilis, treatable with penicillin.
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March 2024 in “Oxford Medical Case Reports” Moth-eaten hair loss can be a sign of syphilis.
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July 2024 in “Indian Journal of Sexually Transmitted Diseases and AIDS” Syphilitic alopecia can be effectively diagnosed and treated, leading to hair regrowth.
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July 2014 in “QJM” A 35-year-old man had patchy hair loss that was actually due to syphilis, not alopecia areata.
April 2026 in “Frontiers in Medicine” Syphilis can cause hair loss even without penetrative sex, but treatment can fully restore hair.