Retronychia is an uncommonly reported condition among the category of nail pathologies. It often presents mimicking similar nail disorders, such as onychocryptosis, onychomycosis, and paronychia. This pathologic condition has recently seen an increased presence in the literature, mainly in the form of case studies. Literature on retronychia was collected using PubMed, the US National Library of Medicine, the National Institutes of Health's online database, life science journals, and online books. References cited by these articles were also reviewed for additional relevant publications. Reviews, case studies, and retrospective articles were compiled and analyzed for commonalities in cause, patient demographics, clinical signs, and treatment. Retronychia may be more common than previously suggested. Proper knowledge and education of this pathologic nail condition is important to health-care professionals to achieve early and correct diagnosis.
Compositae dermatitis in florists is generally occupational. The result of airborne exposure is a serious skin reaction and an objective medical requirement to stop work, since the conditions for an occupational disease required by section 5101 of the appendix to the Ordinance on Industrial Disease are fulfilled. We report on a florist, who suffered over a period of 27 years from chronic, repetitive and finally continuous eczema on air-exposed skin areas. Despite evidence of a highly sensitive type IV response to compositae, it was only after she stopped working, with the resulting elimination of the continuous exposure to allergens that the airborne trigger became apparent. This was a spring-summer-fall dermatitis resulting from airborne pollen exposure to compositae. As contact with airborne compositae constituents is almost impossible to avoid, her prognosis was poor and we estimated that she was at least 40% disabled for general employment market.
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