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Lasers for Onychomycosis
Aditya K Gupta1,2, Kelly A Foley2, Sarah G Versteeg2
11 Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
Abstract:
Many studies that have been recently published investigate the efficacy of laser treatment for onychomycosis. These studies support the current US Food and Drug Administration (FDA) approval of lasers for the 'temporary increase in clear nail'. Clear nail growth is an important treatment goal for patients; however, many do not realise that laser treatment is not a cure for onychomycosis. The current article briefly reviews why lasers may be theoretically effective in treating onychomycosis and critically reviews published laser studies for onychomycosis in light of the standards employed in drug trials. Treatment regimens, efficacy endpoints, and the unit of analysis (nails vs patients) vary widely among published laser studies. Complete cure, mycological cure, and clinical improvement rates in laser studies are not reported or use such disparate criteria that comparison among studies is not possible. The US FDA has recently published guidelines for the use of medical devices in clinical trial design for onychomycosis. Future laser studies should adopt the FDA's guidelines to allow for more consistency within the field and focus on the efficacy of lasers as monotherapy for onychomycosis.
Insights
Laser treatment for fungal nail infections (onychomycosis) temporarily improves nail appearance but is not a cure. Future studies need consistent FDA guidelines for reliable efficacy data.
Area of Science:
- Dermatology
- Medical Device Technology
Background:
- Onychomycosis is a common fungal nail infection.
- Laser treatment is FDA-approved for temporary improvement in clear nail growth.
- Patients often misunderstand that laser therapy is not a cure for onychomycosis.
Purpose of the Study:
- To review the theoretical basis for laser efficacy in onychomycosis.
- To critically evaluate published laser treatment studies against drug trial standards.
- To highlight inconsistencies in current research and propose improvements.
Main Methods:
- Literature review of laser treatment studies for onychomycosis.
- Comparative analysis of study methodologies against US Food and Drug Administration (FDA) guidelines for medical devices.
- Assessment of reported efficacy endpoints and units of analysis.
Main Results:
- Published laser studies exhibit significant variability in treatment regimens, efficacy endpoints, and units of analysis (nails vs. patients).
- Rates of complete cure, mycological cure, and clinical improvement are inconsistently reported, precluding meaningful comparison between studies.
- Current research does not consistently adhere to established standards for clinical trial design in onychomycosis.
Conclusions:
- Laser treatment offers temporary nail clearance for onychomycosis, not a definitive cure.
- Inconsistent methodologies and reporting in current studies hinder the evaluation of laser efficacy.
- Future research must adopt FDA guidelines for medical device trials to ensure consistency and reliable data on laser monotherapy for onychomycosis.
