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[email protected] 32 Recent Patents on Inflammation & Allergy Drug Discovery 2020, 14, 32-45 REVIEW ARTICLE ISSN: 1872-213X eISSN: 2212-2710 Inflammation & Allergy Drug Discovery Onychomycosis: An Updated Review Alexander K.C. Leung1,*, Joseph M. Lam2, Kin F. Leong3, Kam L. Hon4, Benjamin Barankin5, Amy A.M. Leung6 and Alex H.C. Wong7 1Department of Pediatrics, The University of Calgary, Alberta Children’s Hospital, Calgary, Alberta, Canada; 2Department of Pediatrics and Department of Dermatology and Skin Sciences, The University of British Columbia, Vancouver, British Columbia, Canada; 3Pediatric Institute, Kuala Lumpur General Hospital, Kuala Lumpur, Malaysia; 4Department of Paediatrics, The Chinese University of Hong Kong, and Department of Paediatrics and Adolescent Medicine, Hong Kong Children’s Hospital, Shatin, Hong Kong; 5Toronto Dermatology Centre, Toronto, Ontario, Can- ada; 6Department of Family Medicine, The University of Alberta, Edmonton, Alberta, Canada; 7Department of Family Medicine, The University of Calgary, Calgary, Alberta, Canada Abstract: Background: Onychomycosis is a common fungal infection of the nail. Objective: The study aimed to provide an update on the evaluation, diagnosis, and treatment of ony- chomycosis. Methods: A PubMed search was completed in Clinical Queries using the key term “onychomycosis”. The search was conducted in May 2019. The search strategy included meta-analyses, randomized con- trolled trials, clinical trials, observational studies, and reviews published within the past 20 years. The search was restricted to English literature. Patents were searched using the key term “onychomycosis” in www.freepatentsonline.com. A R T I C L E H I S T O R Y Results: Onychomycosis is a fungal infection of the nail unit.