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Related to twenty-nail dystrophy: Trachyonychia
longitudinal ridging of all of the nails; seen in alopecia areata and lichen planus.
Farlex Partner Medical Dictionary © Farlex 2012
Longitudinal ridging and fragmentation of all the fingernails and toenails. It is a characteristic finding in lichen planus.
See also: dystrophy
Medical Dictionary, © 2009 Farlex and Partners