Result of Radiotherapy for Esophagus Cancer

식도암의 방사선 치료 결과

  • Jung Taesig (Department of Radiation Oncology, Kosin Medical College and Medical Center) ;
  • Moon Changwoo (Department of Radiation Oncology, Kosin Medical College and Medical Center) ;
  • Yum Hayong (Department of Radiation Oncology, Kosin Medical College and Medical Center) ;
  • Yang Chilyong (Department of Radiation Oncology, Kosin Medical College and Medical Center)
  • 정태식 (부산 고신의료원 치료방사선과) ;
  • 문창우 (부산 고신의료원 치료방사선과) ;
  • 염하용 (부산 고신의료원 치료방사선과) ;
  • 양칠용 (부산 고신의료원 치료방사선과)
  • Published : 1988.12.01

Abstract

Among 165 patients of esophagus cancer treated by either radiation alone or postoperative radiation, median survival period was 6.6 months, $16\%$ 3 years and $8\%$ 5years crude survival. In biphasic plotting of survival curve semilogarithmically all nonresponder died within one year regardless of treatments and in responder each 1, 2, 3 years survival rate was $80\%,\;70\%,\;60\%$ in the group of postoperative radiation among 20 patients ($54\%$ of 37 patients) respectively and $62\%,\;38\%,\; 23\%$ each in the group of radiation alone among 61 patients ($48\%$ of 128 patients) respectively, better survival rate of postoperative radiation vs radiation alone in 3 year (P<0.01). The most common cause of death was dysphagia $55\%$, and majority of patients died by failure to control the disease locally $62\%,\;88\%$ of stricture were associated with persistenece of cancer in esophagus. $50\%$ of patients was found to have locoregional metastatc nodes. Preoperative diagnostic failure rate was for metastatic locoregional nodes was $54\%$, for grossly metastatic nodes $29.7\%$, for blood borne organ metastasis $13.5\%$, and for local extent of the disease $14\%$. The residual cancer at surgical margin o. postitive node was not effectively killed by either 5000 to 5500 cGy conventional radiation or 5290 to 5750 cGy with 115 cGy fraction in 2 times daily; hyperfractionated radiation. However hyperfractionation schedule decreased the both acute and late complications in this study.

방사선 단독 치료나 수술후 방사선 치료를 받았던 165명의 식도암 환자 중에서 평균 생존율은 6.6개원이였으며 3,5년 생존율은 $10\%,\;8\%$였다. 생존율을 semilogarithmical하게 나타낸 biphasic plotting에서 보면 non-responder group은 치료에도 불구하고 1년내 모두 사망하였고 responder group중에서는 수술후 방사선 치료를 받았던 환자 20명 $(54\%)$은 1, 2, 3년 생존율이 각각$80\%,\;70\%,\; 60%$였으며, 방사션 치료만 받은 환자 61명$(48\%)$의 생존율은 각각 $62\%,\;38\%,\;23\%$였다. 즉, 3년간의 생존율의 비교는 수술후 방사선 치료가 방사선 단독치료 보다는 좋았다 (P<0.01). 가장 많은 사망의 원인으로는 연하곤란$(55\%)$이였으며 환자의 대다수는 국소적인 치료실패에 의해 사망하였으며 $(62\%)$ 협착의 $88\%$는 지속적인 암의 존재와 관련이 있었다. 환자의 $50\%$는 국소적인 임파절 전이가 발견되었다. 수술전의 진단 실패율은 $54\%$가 국소임파절 전이 때문에, $29.7\%$가 육안적인 임파절 전이 때문에, $13.5\%$가 혈행성 전이 때문에 그리고 $14\%$가 국소적인 직접 침범 때문이였다. Conventional radiation (6000 cGy/30 fraction in 6 weeks)이나 hyperfractionation radiation (upto 6900cGy, l15cGy/fraction)이거나 관계없이 gross disease는 충분히 즉일수 없었다. 그러나 hyperfractionation 테크닉에 의해서 급성 방사선 염증이 감소되어서 환자의 고통을 덜어줄 수 있었으며 그 후의 만성 부작용으로서의 방사선 합병증이 현저히 감소되었다.

Keywords