Daniel et al reported a grading system for onycholysis. The authors are from Jackson, Mississippi, and Bologna, Italy.



separation of 1-2 mm of the distal nail plate from the hyponychium

Stage I

separation of the distal third of the nail plate

Stage II

separation of the distal two thirds of the nail plate

Stage III

separation of the proximal third of the nail plate; separation extending from the proximal nail fold to the distal end of the nail (onychomadesis)

Stage IV

disappearing nail bed (with cornification of the nail bed)

Stage V


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