Background: Onychomycosis is one of the most common diseases of the toenails. The costs of diagnosis and treatment are substantial, and as the population ages, the overall cost burden will continue to escalate. The purpose of this study was to correlate dermoscopic features with pathologic diagnosis to support the accuracy of point-of-care diagnosis by dermoscopic examination.
Methods: Nail unit pathology reports of 52 patients with abnormal great toenails were compared with the dermoscopic features detected by nail unit dermoscopy.
Results: The dermoscopic analysis predicted the laboratory diagnosis in 90.4% of the study patients. The specific dermoscopic findings of short spikes (P < .001), long striae (P < .001), aurora borealis (P < .001), irregular termination (P = .003), dermatophytoma (P = .011), transverse onycholysis (P = .018), and dry scale (P = .04) patterns were all significantly associated with pathology test results consistent with oncyhomycosis. Transverse onycholysis (P = .018) was significantly associated with negative pathology results consistent with the diagnosis of nail dystrophy.
Conclusions: Point-of-care examination by dermoscopy positively correlates with histopathologic tests and could be used to diagnose onychomycosis while reducing diagnostic costs.
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