[Delayed effect of radiation therapy on extracerebral XXXX in the middle fossa].

@entity5 @entity2477 @entity548
This is a report of a case with extracerebral @entity2477 in the middle fossa which had received radiation therapy. Follow-up study with serial computed tomography during and after irradiation were presented. A 62-year-old housewife complained of vertigo. CT scan revealed a slightly high density area in the left middle cranial fossa which was markedly enhanced with contrast media. Left carotid angiography demonstrated a large avascular mass in the left middle fossa and no feeding artery or draining vein was visualized except a faint irregular stain in the venous phase. Irradiation with a total dose of 50 Gy was delivered. At the end of radiation, CT scan revealed a slight decrease in size and CT number of the @entity5 . Follow-up CT scans 5 months later showed 50% regression of the @entity5 and 19 months later were negative for @entity5 . It is concluded that in case of an extracerebral @entity2477 with @entity548 , radiation of up to 30-50 Gy was a method of choice. The treatment results in the possibility of eliminating surgery and the benefit of irradiation may not become evident until the first year.
