[Giant pleomorphic adenoma of the parotid gland: one case report and review of the literature].
To investigate the cause, genetics, clinical features, pathological mechanism, diagonosis and treatment of the Giant pleomorphic adenoma of the parotid gland (GPA). A case of GPA was reported and relevant literatures were reviewed. GPAs were more commonly found in elderly patients, duration of more than 10 years, with a possible malignant degeneration. CT scan shows uneven density, different degrees of enhancement and clear boundary. Pathological examination shows that the composition of tumor tissue are epitheli al cells, myoepithelial cells and mucus. GPA is an uncommon disease and is associated with human factors. The diagnosis of GPA is oriented by medical history, physical examination and imaging tests. The total resection of the tumor and preservation of the facial nerve is an effective way for the treatment of GPA.