A patient had tinea nigra palmaris that had not responded to tolnaftate or salicylic acid ointment during a period of seven years. Thiabendazole suspension, 10% applied twice daily, cleared the lesion in two weeks.
Carr JF, Lewis CW. Tinea Nigra PalmarisTreatment With Thiabendazole Topically. Arch Dermatol. 1975;111(7):904-905. doi:10.1001/archderm.1975.01630190094013