<prompt> Complication of chronic Lichen planusDermatofibromaMalignant melanomaBasal cell carcinomaSquamous cell carcinoma  <response>: The complication of chronic lichen planus squamous cell carcinoma Squamous cell carcinoma developing on oral lesions is uncommon but a potential danger, especially in ulcerated lesions There are repos of metastatic squamous cell carcinoma arising from long-standing lesions of hyperophic LP. Majority in lesions on the distal extremities Ref Harrison 20th edition pg 1256 