label: Salivary Gland Carcinoma ex Pleomorphic Adenoma
label_lc: salivary gland carcinoma ex pleomorphic adenoma
description: A carcinoma that arises from a pleomorphic adenoma in the salivary glands.  It usually originates in the parotid gland.  Patients usually present with a history of a long-standing tumor mass which grew rapidly in the past few months.  Patients with non-invasive or minimally invasive carcinoma have an excellent prognosis.  In cases where there is invasion of the surrounding tissues, the clinical course is aggressive.