Role of Radiation Therapy in the Treatment of Cerebral Oligodendroglioma: An Analysis of 57 Cases and a Literature Review

Neurosurgery ◽  
1983 ◽  
Vol 13 (5) ◽  
pp. 499-503 ◽  
Author(s):  
Peter D. Reedy ◽  
Janet W. Bay ◽  
Joseph F. Hahn

Abstract Fifty-seven cases of histologically confirmed cerebral oligodendroglioma treated at the Cleveland Clinic between 1950 and 1980 were reviewed. No difference in the 5-year survival rate was seen in patients treated with postoperative radiation therapy vs. operation alone. These data are compared to previously published series with special emphasis on the role of radiation therapy.

Author(s):  
Antonin Levy ◽  
Olaf Mercier ◽  
Cécile Le Péchoux

Patients with locally advanced resected non–small-cell lung cancer present a high risk of relapse. Although adjuvant platinum–based chemotherapy has become the standard of care, the role of postoperative radiation therapy (PORT) has been controversial for years. In patients with incomplete resection, PORT should be proposed, on the basis of a strong consensus, despite the absence of randomized evidence. In patients with completely resected (R0) non–small-cell lung cancer, a meta-analysis showed poorer outcomes after PORT in the absence of mediastinal involvement (pN0 and pN1). In patients with pN2, the role of PORT was less clear and required further research. The meta-analysis included trials using older radiation techniques and poorer quality of surgery according to today's standards, and selection of patients was not positron emission tomography–based. Newer retrospective and nonrandomized studies and subgroup analyses of randomized trials evaluating adjuvant chemotherapy suggested a survival benefit of PORT in patients with pN2 R0. Two recent randomized trials (Lung ART and PORT-C) evaluating conformal PORT versus no PORT retrieved no disease-free survival advantage for stage IIIA-N2 patients, even if mediastinal relapse was significantly decreased with PORT. PORT had no effect on survival, possibly given the high rate of distant relapse and risk of additional cardiopulmonary toxicity. Ongoing and future analyses are planned in Lung ART to identify patients for whom PORT could be recommended. Incorporation of newer systemic treatments (immune checkpoint inhibitors or targeted therapy in oncogene-addicted patients) is underway in the neoadjuvant and/or adjuvant setting. Better identification of patients at a high risk of disease recurrence, with analysis of circulating tumor DNA, on the basis of the detection of postsurgical minimal (or molecular) residual disease is warranted in future studies.


2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Meghan P. Olsen ◽  
Allen O. Mitchell ◽  
Edward F. Miles

Salivary gland cancers are rare and represent approximately 5% of all head and neck cancers and only 0.3% of all malignancies. The majority (75%) of salivary gland tumors occur in the parotid gland, and while benign lesions are more common, mucoepidermoid carcinoma (MEC) makes up 40–50% of malignant parotid gland tumors. No randomized controlled trials exist regarding the role of adjuvant radiation for patients who undergo surgical resection of low-grade MECs. Herein, we report two cases of successful postoperative radiation therapy in low-grade, pT2N0 MEC of the parotid gland. The role of adjuvant radiation therapy for patients with MEC of the parotid gland is based on data from institution reviews and lacks data from randomized controlled trials. Per our review of the literature, the pathological findings of positive surgical margins and/or perineural invasion in two patients with low-grade MEC of the parotid gland warranted adjuvant radiation for improved local control after partial parotidectomy. Both patients tolerated postoperative radiation therapy with only mild side effects and, at last follow-up, five years after completion of therapy, had no clinical or radiographic evidence of either local recurrence or distant metastasis.


1995 ◽  
Vol 83 (4) ◽  
pp. 590-595 ◽  
Author(s):  
Kern J. Minehan ◽  
Edward G. Shaw ◽  
Bernd W. Scheithauer ◽  
Dean L. Davis ◽  
Burton M. Onofrio

✓ Seventy-nine patients underwent surgery, with or without radiation therapy, for astrocytoma of the spinal cord. There were 43 tumors (54%) classified as pilocytic astrocytoma and 25 (32%) as diffuse fibrillary astrocytoma. Eleven tumors (14%) could not be classified other than as astrocytoma, “type not otherwise specified.” The 10-year overall survival rate for all 79 patients was 50% but significantly differed by histological type: 81% for patients with pilocytic astrocytoma compared to 15% for those with diffuse fibrillary astrocytoma. Tumor grade by the Kernohan, et al., or St. Anne—Mayo methods was also a significant predictor of survival in patients with diffuse fibrillary astrocytoma. The extent of surgical resection (biopsy vs. subtotal resection vs. gross total resection) did not significantly impact survival among patients with pilocytic or nonpilocytic astrocytomas of the spinal cord, although there was a trend toward poorer survival in patients undergoing some degree of resection as opposed to biopsy. Postoperative radiation therapy improved survival but did so more for diffuse fibrillary astrocytoma than pilocytic astrocytoma. In this series, histological type was the most significant predictor of survival in patients with astrocytoma of the spinal cord. The survival rate was highest in patients who underwent biopsy followed by postoperative radiation therapy.


PEDIATRICS ◽  
1998 ◽  
Vol 102 (Supplement_1) ◽  
pp. 209-210
Author(s):  
Judson Randolph

This fundamental paper by a surgeon, Dr Gross, and a radiologist and radiotherapist, Dr Neuhauser, cleaned up the existing information and conflicting results of therapy for Wilms' tumor through 1947. There is a careful review of literature, comments about existing suggestions of preoperative radiation versus postoperative radiation versus radiation only and versus surgery without radiation. The authors then carefully analyze the experience at Boston Children's Hospital over the period from 1914 to 1947. This material is carefully broken down into three periods, 1914 to 1930, 1931 to 1939, and 1940 to 1947. During period I, 1914 to 1930, 27 cases of Wilms' tumor were seen and four cures were obtained for a survival rate of 14.9%. Beginning in 1931, under the able leadership of Dr William E. Ladd, a vigorous approach to the surgery for children with Wilms' tumor was undertaken. The program consisted of a wide transabdominal incision rather than the more classic approach to kidney surgery by a flank incision. This surgical exposure allowed prompt identification and control of the renal vessels and removal, in most cases, of the entire tumor and kidney mass without rupture of the encapsulated tumor. Additionally, Dr. Ladd insisted on careful fluid and blood replacement before and during surgery and a meticulous approach to the anesthestic management of the child undergoing surgery. In previous experience at Boston Children's and other reported centers, there had been a large number of intraoperative deaths. After 1932, there were no deaths from the surgery at Children's Hospital in Boston. In the 1931 to 1939 experience, 31 patients were operated on and ten cures were achieved for a survival rate of 32.2%. Beginning in 1940, Dr Gross and Dr Neuhauser instituted a program of immediate surgery and postoperative radiation to the bed of the tumor. Thirty-eight children were so treated with a survival rate of 47.3%. This group of patients was subsequently followed for 2½ years so that cures, recurrences, and deaths could be accurately reported. This patient material also emphasized that babies in the first 12 months of life had a far better outlook than did older subjects. The authors also emphasized that if recurrences were to occur, they were usually evident within 9 months after operative removal and radiation therapy. Postoperative radiation therapy was given in daily doses of 200r alternately using three portals, anteriorly, laterally, and posteriorly over the tumor bed reaching a total of 4000 to 5000r using a 200KV machine.


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