the clinical features and management of 20 such tumors ( chordoma 8 , neurilemmoma 3 , teratoma 3 , hemangiopericytoma 1 , chondrosarcoma 1 , osteosarcoma 1 , dermoid 1 , lipoma 1 , and undifferentiated sarcoma 1 ) have therefore been reviewed .
C0027651
tumors
C0023798
lipoma