STUDY DESIGN: Retrospective case series. OBJECTIVE: To evaluate our treatment strategy for @entity424 of the cauda equina. SUMMARY OF BACKGROUND DATA: Some @entity1 with @entity424 develop cerebrospinal fluid (CSF) dissemination leading to poor prognosis. Because of the rarity of this @entity5 , there is no consensus on its optimal treatment options and prognosis. METHODS: We reviewed 25 cases of @entity424 , treated surgically between 1972 and 2005. The mean postoperative follow-up period was 10.4 years. The effects of surgical margins at surgery and postoperative radiotherapy on @entity5 recurrence and prognosis were investigated. RESULTS: In 15 @entity1 , total resection achieved (6 cases of en bloc resection without postoperative radiation, and in 9 cases piecemeal resection) was followed by whole brain and spinal cord radiation or local irradiation. Fourteen of these @entity1 survived without @entity5 recurrence. In 1 case of total resection without radiotherapy, the @entity5 capsule was violated intraoperatively and local recurrence occurred 2 years after surgery. In 4 @entity1 , the @entity5 were removed subtotally. Of these, 2 @entity1 who received radiation (24 Gy) only to the whole brain and spinal cord developed recurrence, and 2 who received whole brain and spinal cord radiation (24 Gy) supplemented with local radiation (46 Gy) developed no recurrence. The remaining 6 @entity1 received partial resection after local radiation (40-50 Gy) alone, and all 6 died of CSF dissemination. CONCLUSION: The results of the present study indicate that the surgical margin obtained at the initial surgery and the extent and amount of postoperative radiation can be crucial factors determining the prognosis of @entity1 with @entity424 . Although this @entity5 is histologically benign, CSF dissemination can occur once @entity5 capsule is violated, before or during surgery. Therefore, early diagnosis is essential, and a therapeutic strategy including radiotherapy, on the assumption that this @entity5 is malignant, should be established.

Long-term surgical outcomes for XXXX of the cauda equina.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'tumors'] @entity424 :: ('MESH:D004806', 'Disease') :: ['myxopapillary ependymoma', 'myxopapillary ependymomas']
@entity424 :: (MESH:D004806,Disease) :: ['myxopapillary ependymomas']
