we present our cases of recurrent pituitary hemangiopericytoma , radiation-induced recurrent meningioma , recurrent clival chordoma , recurrent nasopharyngeal cancer involving the cavernous sinus , and recurrent parotid carcinoma of the skull base which were all successfully retreated with high-activity 125iodine ( i-125 ) permanent implantation .
C1333071
clival chordoma
C0149543
of the skull base