A condition present in 10% of patients with lichen planus. The most common finding is thinning of the
nail plate, leading to longitudinal grooving and ridging. Hyperpigmentation, subungual hyperkeratosis, onycholysis, and longitudinal melanonychia can also be present.
nail plate, leading to longitudinal grooving and ridging. Hyperpigmentation, subungual hyperkeratosis, onycholysis, and longitudinal melanonychia can also be present.