Lichen planus-like keratosis: clinicopathological evaluation of 1366 cases.

Clinicopathologic correlation is necessary to diagnose lichen planus-like keratosis, as the most consistent feature is a clinical history of a lesion/neoplastic process rather than an inflammatory process. There are histopathologic features that can help distinguish lichen planus-like keratosis from lichen planus; however, these features are nonspecific and lacking in almost half of the cases.