Incidence of Malignancy and Its Predictive Factors in Intrapulmonary Nodules Associated with cT1-2N0M0 Non Small Cell Lung Cancer

임상적 병기 T1-2N0M0인 비소세포폐암에 동반된 폐결절의 악성여부 및 그 예측인자

  • Yoon, Ho Il (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Lung Institute, Medical Research Center, Seoul National University) ;
  • Yim, Jae-Jun (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Lung Institute, Medical Research Center, Seoul National University) ;
  • Lee, Choon-Taek (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Lung Institute, Medical Research Center, Seoul National University) ;
  • Kim, Young Whan (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Lung Institute, Medical Research Center, Seoul National University) ;
  • Han, Sung Koo (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Lung Institute, Medical Research Center, Seoul National University) ;
  • Shim, Young-Soo (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Lung Institute, Medical Research Center, Seoul National University) ;
  • Yoo, Chul-Gyu (Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, Lung Institute, Medical Research Center, Seoul National University)
  • 윤호일 (서울대학교 의과대학 내과학교실 및 의학연구원 폐연구소) ;
  • 임재준 (서울대학교 의과대학 내과학교실 및 의학연구원 폐연구소) ;
  • 이춘택 (서울대학교 의과대학 내과학교실 및 의학연구원 폐연구소) ;
  • 김영환 (서울대학교 의과대학 내과학교실 및 의학연구원 폐연구소) ;
  • 한성구 (서울대학교 의과대학 내과학교실 및 의학연구원 폐연구소) ;
  • 심영수 (서울대학교 의과대학 내과학교실 및 의학연구원 폐연구소) ;
  • 유철규 (서울대학교 의과대학 내과학교실 및 의학연구원 폐연구소)
  • Published : 2004.02.28

Abstract

Background : When a non small cell lung caner patient at the $_cT_{1-2}N_0M_0$ stage is diagnosed with intrapulmonary nodule(s), the treatment plan and prognosis of the patient largely depend on whether the nodule is benign or malignant. In most cases, however, it is hard to conduct a biopsy on such a nodule, due to its small size. Furthermore, the predictive factors that may imply benignancy or malignancy of the nodules remain unknown. As such, the purpose of our study was to validate the incidence of malignant nodules in such cases, and find if there are any predictive factors. Methods : Chest computed tomography(CT) scans and the medical records of 444 patients, who had undergone non small cell lung cancer surgery, between July, 2001 and September, 2003, at Seoul National University Hospital, were retrospectively reviewed. Among $_cT_{1-2}N_0M_0$ non small cell lung cancer patients, with intrapulmonary nodule(s), only those cases where a CT scan or a biopsy of the nodules had been conducted, and had been followed up at intervals of more than 6 months were included. However, patients who had received chemotherapy or radiation therapy, pre- or post-operatively, or with calcified nodules, were excluded. Results : Our study group consisted of 39 patients, divided into two groups. The first group, 33 patients, had benign nodules, and the second group, 6 patients, had malignant nodules. The two groups were compared with regard to gender, age, cell type, pathologic stage, shape, size, location and number of nodules and presence of calcification around the nodules. There was no statistically significant difference between the two groups. Conclusion : The intrapulmonary nodules in non small cell lung cancer patients at the $_cT_{1-2}N_0M_0$ stage were mostly benign. Therefore, surgical treatment for such patients can be considered. Moreover, without predictive factors, pathological confirmation of the diagnosed nodules should be sought in all patients.

연구배경 : 임상적 병기 $T_{1-2}N_0M_0$인 비소세포폐암에서 주 종괴와 같은 엽 혹은 다른 엽에 폐 결절이 존재하는 경우, 이 결절의 악성여부에 따라 환자의 예후는 물론 치료방침이 크게 달라진다. 그러나 조직검사가 어려워 악성여부를 감별하기 어려운 경우가 많고, 악성 혹은 양성을 시사하는 임상적, 조직학적 예측인자가 알려져 있지 않아 악성의 빈도 및 예측인자를 알아보고자 본 연구를 시행하였다. 방 법 : 2001년 7월부터 2003년 9월까지 서울대학교병원에서 비소세포폐암으로 수술 받은 환자 444명의 흉부 전산화 단층촬영을 후향적으로 검토하였다. 수술 전 임상적 병기가 $T_{1-2}N_0M_0$이고 주 종괴 외의 폐 결절이 존재하는 환자 중, 결절에 대한 조직검사가 이루어진 경우나 수술 후 최소한 6개월 이상의 추적검사가 가능했던 경우만을 포함하였으며 수술 전후 항암치료나 방사선치료를 시행 받은 경우나 석회화된 결절의 경우는 제외하였다. 결 과 : 대상환자는 총 39명이었으며 이 중 양성이 33 예, 악성이 6 예였다. 양성군과 악성군에 대하여 환자의 성별, 나이, 조직형, 병기, 결절의 모양, 크기, 동반결절유무, 위치, 주변의 석회화 존재여부 등을 비교하였으나 이 중 어느 인자에 관하여도 통계적으로 의미 있는 차이는 관찰되지 않았다. 결 론 : 비소세포암의 임상적 병기가 $T_{1-2}N_0M_0$인 경우, 동반된 폐결절 중 다수가 양성결절이므로 수술적 치료를 고려할 수 있다. 또한 양성 혹은 악성 여부를 시사하는 임상적, 방사선학적 소견이 없으므로 조직학적 확인을 하기 위한 노력이 필요하다.

Keywords

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