Abstract
A 24-year-old housewife came to our department on Oct. 1st, 1986 with a complaint of nail changes in the nail of her right thumb. Ten months previously she had injured the thumb with a sewing machine needle. Three weeks later she noticed pustule formation under the nail in the same location.
The thumb was punctured for drainage and onychectomy was performed three times but in vain. Light microscopic features in a 20% KOH sample of the scales of the nail revealed oddly shaped elements. In all of three mycologic culture examinations of the scales, colonies of Aspergillus niger was diagnosed detected, so the disease as onychomycosis due to Aspergillus niger.
