Solitary lesions of lichen planus (LP) are often confused with other i
nflammatory or malignant epithelial lesions. We describe a 51-year-old
woman who had had an LP of the lower lip for 11 years. She had underg
one several oral and topical therapies with little improvement. The pa
tient had an excellent response to chloroquine phosphate within 3 mont
hs. This report represents the third case of LP exclusively localized
on the lower lip.