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Vol.41 No.1 contents | Japanese/English |
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- Original Article -
Assessment of Neoplasm Staging for Pathologic Stage I Non-small Cell Lung Cancer Using Postoperative Results
Takeshi Yamanda, Takayuki Shiina, Akiko Makiuchi, Makoto Kurai, Ryouichi Kondo, Hiroki Numanami, Keiichiro Takasuna, Emi Machida, Masayuki Haniuda and Jun AmanoSecond Department of Surgery, Shinshu University School of Medicine, Matsumoto, Japan
Objective: To evaluate the neoplasm staging for pathologic stage I non-small cell lung cancer, we investigated the postoperative results in these patients. Study Design: Three hundred and ninety consecutive stage I non-small cell lung cancer patients who underwent standard resections with hilar and mediastinal lymphadenectomy in our department from 1982 to 1999 were evaluated. Results: The 5-year survival and postoperative recurrence rate in patients with stage IA (81.2%, 11.8%) were better than those with stage IB (64.9%, 19.5%). In regard to the histologic types, the outcome of patients with stage IB squamous cell carcinoma was unfavorable compared with those with stage IA adenocarcinoma, stage IA squamous cell carcinoma and stage IB adenocarcinoma. The survival rate for patients with tumors sized 10 mm or less was significantly better than that for other patients with stage IA disease whose tumors measured 11 to 30 mm. For patients with stage IB, there were no significant differences between the 5-year survival rate and recurrence rate for patients with tumors sized more than 5 cm and those with tumors measuring 3 to 5 cm. The postoperative results of patients with stage IB due to only visceral pleural invasion (tumors measuring 30 mm or less) were significantly better than those of other patients with stage IB, and were similar to those of patients with stage IA. Conclusion: The division of stage I into IA and IB was considered an appropriate revision on the whole. However, this new classification may not be entirely satisfactory in regard to the tumor size, histologic types and visceral pleural invasion.
key words: Non-small cell lung cancer, Neoplasm staging, Stage I, Postoperative recurrence, Prognosis
Received: September 22, 2000
Accepted: December 6, 2000
JJLC 41 (1): 27-31, 2001
