<prompt> Carcinoma Ex pleomorphic adenoma isMalignant change of pleomorphic adenomaRegrowth of pleomorphic adenoma after superficial parotidectomy due to inadquate removalPainless conditionSlow and progressive growth of pleomorphic adenoma  <response>: Carcinoma Ex pleomorphic Adenoma Malignant mixed tumourMalignant change of pleomorphic adenomaHas rapid growth and painfulLeads to paraesthsia and facial weakness. 