Efficacy of Paclitaxel plus TS1 against previously treated EGFR mutated non-small cell lung cancer

Background

Later line chemotherapy (≥2nd lines) such as Docetaxel or immunotherapy is frequently used. As the life expectancy of lung cancer patients is getting longer, we need to provide more treatment options. Other treatment options are not well documented except for Doxetaxel and immunotherapy. Therefore, the efficacy of paclitaxel plus TS1 (TTS1) is warranted.

Methods

We retrospectively reviewed the chart records of our non-small cell lung cancer patients who were treated between 2010 and 2013. Clinical characteristics, type of tumor, EGFR mutation status, and treatment response to first-line EGFR-TKI therapy and efficacy of TTS1, were collected.

Results

Twenty eight patients were enrolled in this study. No patients archived complete response and seven patients had partial response (ORR: 25%). The disease control rate was 60.7% (17/28). The progression free survival (PFS) was 4.0 months and overall survival (OS) was 15.8 months. Of them, 17 had EGFR mutations, eight EGFR wild type, and three were unknown EGFR status. After TTS1 treatment, patients with EGFR mutations had better PFS (4.9 months vs. 1.8 months) and OS (15.5 months vs. 7.2 months) compared with those of EGFR wild type.

Conclusions

TTS1 are effective later line chemotherapy, especially in tumor EGFR mutated patients. Paclitaxel plus TS1 is another treatment of choice for NSCLC patients before a more effective treatment strategy is found.

Feasibility study of adjuvant chemotherapy of S-1 and carboplatin for completely resected non-small cell lung cancer

BACKGROUND

The purpose of this study was to evaluate the feasibility and compliance of adjuvant chemotherapy of S-1 plus carboplatin for patients with completely resected non-small cell lung cancer (NSCLC) of pathological stage IB-IIIB.

METHODS

S-1 was given orally at a dose of 80 mg/m²/day for 2 weeks, followed by a 2-week period of no treatment. Carboplatin was given intravenously on day 8 at an area under the curve of 6. This regimen was repeated for four to six 28-day courses.

RESULTS

Seventeen patients were enrolled in this study. Fourteen of them completed at least 4 cycles of chemotherapy. Nine patients had grade 2 and three patients had grade 3 thrombocytopenia, respectively. Severe nonhematologic toxicities were uncommon. Treatment was delayed in a few patients because of prolonged thrombocytopenia.

CONCLUSION

We concluded that the regimen was feasible and tolerable for patients with completely resected NSCLC as adjuvant chemotherapy.