[Ulcerative plantar lichen. Is it an indicator of an autoimmune disease?].

A 48 years old female has had erosive and ulcerative lichen planus with sores in both heals, onychodystrophy and typical lesions in oral mucous membranes. Laboratory examination revealed specific abnormalities indicative of autoimmune thyroiditis and primary biliary cirrhosis. This clinical variant of lichen planus was associated with immunological disturbances. Autoimmune diseases must be investigated in patients with erosive and ulcerative lichen planus.