Repeat pulmonary resection for recurrent lung metastases from colorectal cancer: an analysis of prognostic factors

Ayumi Hachimaru, Ryo Maeda, Takashi Suda, Yasushi Takagi
Interactive Cardiovascular and Thoracic Surgery 2016, 22 (6): 826-30

OBJECTIVES: The purpose of this study was to investigate the prognostic factors for repeat lung metastasectomy in patients with colorectal cancer, which may be clinically helpful in defining a subset of patients who are most likely to benefit from repeat lung metastasectomy.

METHODS: In total, 138 patients underwent complete lung resection for the first time due to metastases of colorectal cancer between January 2004 and December 2013 at Fujita Health University School of Medicine. Among them, 33 underwent repeat pulmonary metastasectomy for lung tumour recurrence. Kaplan-Meier survival curves and log-rank tests were used to analyse the survival rates.

RESULTS: No patient died as a direct result of surgery, and all patients were discharged after the repeat pulmonary metastasectomy. The 5-year survival rate after the initial pulmonary resection of the 33 patients who underwent repeat lung resection was 64%, which was not significantly different from that of the 105 patients who did not undergo repeat lung resection (5-year survival rate, 61%; P = 0.779). Univariate analysis identified only one significant prognostic factor: preoperative serum carcinoembryonic antigen (CEA) level (P = 0.002). The 5-year survival rates of patients with high preoperative CEA levels and normal CEA levels after repeat metastasectomy were significantly different at 47 and 90%, respectively.

CONCLUSIONS: Prethoracotomy serum CEA levels affect survival rates after repeat pulmonary resection. The preoperative assessment of serum CEA levels before repeat metastasectomy is important when considering repeat pulmonary resection, and prethoracotomy CEA levels should be taken into account when selecting patients for repeat lung resection.

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