The Onychomycosis/Onychodystrophy Dermoscopy study (OMODO)—A comparative prospective study of onychoscopy features

Background: Onychomycosis (OM) and traumatic onychodystrophy (OD) are common causes of toenail dystrophy. Their treatment and prognosis differ, so early diagnosis is essential and questionable without mycology. Onychoscopy may prove useful in this setting. Although, few studies have addressed this issue and none directly compared OM and OD onychoscopic findings. We aimed to identify and describe onychoscopic patterns associated with OM and OD, proposing an onychoscopy-based algorithm to guide their differential.