20 benign and 10 malignant tumors of primary location in the retromaxillary region had been operated by total removal : 7 pleomorphic adenomas arising from aberrant salivary glands , 3 neurofibromas , 1 neuroma , 1 gangliocytoneuroma , 1 hemangiopericytoma , 2 extracranial located meningeomas , 3 lipomas .
C0026277
pleomorphic adenomas
C0036098
salivary glands