PMID: 2498240Jun 1, 1989Paper

Management of local residual primary lesion of nasopharyngeal carcinoma (NPC): are higher doses beneficial?

International Journal of Radiation Oncology, Biology, Physics
J H YanX Z Gu

Abstract

One hundred and eighty-two nasopharyngeal carcinoma (NPC) patients, treated from March 1958 through 1978, received 70 Gy or more and were left with gross residual lesion in the nasopharynx, were retrospectively analyzed. Ninety-two patients were given a boost by reduced portals to a total of 90-120 Gy (boost group) whereas for the other non-randomized 90 patients, the treatment was stopped at 70 Gy (observation group). The local recurrence, distant metastasis and 5-year survival rates of the two groups are: 35% (32/92) vs. 58% (52/90), 20% (18/92) vs. 43% (39/90), and 54% (50/92) vs. 21% (19/90), respectively. The benefit of boost is more apparent in patients with T1-2 than T3-4 lesions (p less than 0.001), at increased risk of radiation encephalo-myelitis from 5.5% to 17%. The authors believe that boost be given to patients with early Stage T or small residual lesion at the primary site of NPC.

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