Longitudinal grooving, ridging and splitting, a peculiar midline fissure, and a peculiar progressive atrophy practically ending in the disappearance of the nail-plate are nailanomalies observed in a good number of cases of lichen planus. A relation between these nailanomalies and lichen planus seems to be justified.
RONCHESE F. Nail in Lichen Planus. Arch Dermatol. 1965;91(4):347–350. doi:10.1001/archderm.1965.01600100063016
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