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MO22 - Advanced Disease and Outcomes (ID 103)
- Event: WCLC 2013
- Type: Mini Oral Abstract Session
- Track: Surgery
- Presentations: 1
MO22.07 - Local treatment of oligometastatic recurrence after surgery for non-small cell lung cancer. (ID 932)
10:30 - 12:00 | Author(s): M. Kohno
We previously reported a retrospective study indicating the prognostic impact of local treatment of postoperative oligometastases in patients with non-small cell lung cancer (NSCLC) (Yano T et al. J Surg Oncol 2010;102:852-855). However, previous studies have not been sufficient to determine the therapeutic significance of local treatment for postoperative oligometastases since the conclusions were based on retrospectively collected data and the assessment of overall survival. In the present study, we prospectively observed postoperative oligometastatic patients and investigated the effects of local treatment on progression-free survival (PFS).
Using a prospectively maintained database of patients with completely resected NSCLC treated between October 2007 and December 2011, we identified 52 consecutive patients with postoperative recurrence. Of these patients, 31 suffering from distant metastases alone without primary site recurrence were included in this study. In order to exclude cases of second primary carcinoma of the lungs, the criteria of Martini and Melamed, modified by Antakli et al., were used to differentiate between second primary lung cancer and pulmonary metastasis. According to the definition of ‘oligometastases’ as limited recurrence potentially controlled with local treatment, 17 patients had oligometastatic disease. The number of metastases was less than four.
The oligometastatic sites included the lungs in five patients, the brain in four patients, bone in four patients, the lungs and brain in two patients, the adrenal glands in one patient and soft tissue in one patient. Fifteen of the 17 patients first received local treatment. Three patients (lung, adrenal gland, soft tissue) underwent surgical resection, and the remaining 12 patients received radiotherapy. The median PFS was 33 months in the oligometastatic patients who received local treatment. There were seven patients with a PFS of longer than two years. The metastatic sites in these patients varied, and the number of lesions in three patients was two or three. On the other hand, the two remaining patients first received a systemic chemotherapy of their own selection. The PFS of these two patients was five and 15 months, respectively.
Both our previous retrospective study and the present study favor a choice of local treatment in patients with postoperative oligometastatic NSCLC.
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