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Comparison the Growth Rate between the Affected and the Unaffected Great Toenail in the Same Patients with Onychomycosis

Jong Min Park,Sang Jin Kwon,Gee Joon Yu
Epub 2016 February 22

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Abstract



BACKGROUND: Onychomycosis is a common manifestation of fungal disease, accounting for 50% of all nail problems and a recent rise in the prevalence of onychomycosis has been noted. Despite enormous advances in the treatment of onychomycosis in recent years, treatment frequently fails and recurrences of infection following successful therapy are not uncommon. In order to understand the pathogenesis of onychomycosis, it is crucial to know the factors affecting the nail growth (individual health, age, sex, familial tendency and seasonal factor, etc) and the growth rate of nails. 


OBJECTIVE: The purpose of this study was to find any difference of growth rate between affected and unaffected toe nails in the same individual.


METHODS: During a 2-year-period from February, 1998 to February, 2000, 49 patients who had attended our department with distal subungal onychomycosis affecting only one sided toe nail were recruited. A reference mark (lunula or 3 mm from the border of the proximal nail fold) by CO2 laser was etched on the nail plate of their both great toe nail. Patients were seen at intervals of 1-2 weeks. At each visit the vertical distance was measured between the lunula or the proximal nail fold and the mark on the nail plate. The growth rate of affected and unaffected toe nails in the same patients was measured. All data are reported as mean ± SD and statistical analysis was performed using the paired t-test.


RESULTS: The growth rate of the affected great toe nails showed a decrease against that of the unaffected. The affected toe nails were divided to above 50% and under 50% according to the size of invasion of the nail plate by fungi and compared with unaffected toe nails respectively. In under 50% we did not find any statistically significant difference of the growth rate.


CONCLUSION: our study did not support slow linear nail growth as a predisposing factor for onychomycosis. Other factors such as local abnormality of nails which are more common in older patients may be responsible for the increased incidence of onychomycosis in this group.



Keywords


Growth rate Onychomycosis




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