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Lenvatinib in patients with advanced or metastatic thymic carcinoma (REMORA): a multicentre, phase 2 trial
Jun Sato1, Miyako Satouchi2, Shoichi Itoh2
1Department of Experimental Therapeutics, National Cancer Center Hospital, Tokyo, Japan.
Background:
Thymic carcinoma is a rare malignant disease and standard treatment for advanced or metastatic thymic carcinoma previously treated with platinum-based chemotherapy has not been established. Lenvatinib is a novel multi-targeted inhibitor of VEGFR, FGFR, RET, c-Kit, and other kinases. The aim of this trial was to assess the activity and safety of lenvatinib as a second-line treatment in thymic carcinoma.
Methods:
This single-arm, phase 2 trial done in eight institutions in Japan (five cancer centres, two medical university hospitals, and one public hospital) enrolled patients with pathologically confirmed unresectable advanced or metastatic thymic carcinoma that progressed following at least one platinum-based chemotherapy. Key inclusion criteria were age 20 years or older, at least one measurable lesion as defined by the Response Evaluation Criteria in Solid Tumors version 1.1, and an Eastern Cooperative Oncology Group performance status of 0 or 1. Patients received 24 mg of lenvatinib orally once daily in 4-week cycles until disease progression or occurrence of unacceptable adverse events. The primary endpoint was objective response rate evaluated at the data cutoff date (Feb 22, 2019), by independent central review in the intention-to-treat population. This trial is registered on JMACCT, JMA-IIA00285, and on UMIN-CTR, UMIN000026777.
Findings:
Between April 21, 2017, and Feb 22, 2018, 42 patients were enrolled and all patients were included in the activity and safety analysis. The median follow-up period was 15·5 months (IQR 13·1-17·5). The objective response rate was 38% (90% CI 25·6-52·0, p<0·0001). 16 (38%) of 42 patients had a partial response and 24 (57%) had stable disease. The most frequent grade 3 treatment-related adverse events were hypertension (27 [64%]) and palmar-plantar erythrodysaesthesia syndrome (three [7%]). No patient died from adverse events.
Interpretation:
The activity and safety of lenvatinib in patients with advanced or metastatic thymic carcinoma was confirmed. These results suggest that lenvatinib could become a standard treatment option for patients with previously treated advanced or metastatic thymic carcinoma.
Funding:
Center for Clinical Trials, Japan Medical Association.
Insights
Lenvatinib demonstrated significant activity in treating advanced thymic carcinoma after chemotherapy. This multi-targeted kinase inhibitor offers a potential new standard treatment for patients with previously treated metastatic thymic carcinoma.
Area of Science:
- Oncology
- Medical Oncology
- Clinical Trials
Background:
- Thymic carcinoma is a rare malignancy with no established standard treatment for advanced or metastatic cases post-platinum-based chemotherapy.
- Lenvatinib, a multi-targeted kinase inhibitor, targets VEGFR, FGFR, RET, and c-Kit.
Purpose of the Study:
- To assess the efficacy and safety of lenvatinib as a second-line treatment for advanced or metastatic thymic carcinoma.
- To evaluate lenvatinib's objective response rate (ORR) in patients who progressed after platinum-based chemotherapy.
Main Methods:
- A single-arm, phase 2 clinical trial conducted across eight Japanese institutions.
- Enrolled patients with unresectable, advanced/metastatic thymic carcinoma progressing after platinum-based chemotherapy.
- Patients received 24 mg of lenvatinib orally daily until disease progression or unacceptable adverse events.
Main Results:
- The objective response rate (ORR) was 38% (90% CI 25.6-52.0, p<0.0001).
- Partial response was observed in 38% of patients, and 57% achieved stable disease.
- Grade 3 hypertension (64%) and palmar-plantar erythrodysaesthesia syndrome (7%) were the most frequent adverse events; no treatment-related deaths occurred.
Conclusions:
- Lenvatinib showed confirmed activity and a manageable safety profile in advanced or metastatic thymic carcinoma.
- Lenvatinib may represent a new standard treatment option for patients with previously treated thymic carcinoma.
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