Histological findings include features of LP (hyperkeratosis, hypergranulosis, irregular acanthosis, vacuolar degeneration of the basal cell layer, pigment incontinence) with or without features of CLE (hyperkeratosis, vacuolar degeneration of the basal cell layer, follicular plugging, lymphoid infiltrate, interstitial mucin). Here, MUC5AC is linked to Hyperkeratosis.