S‐1 Plus Cisplatin with Concurrent Radiotherapy for Locally Advanced Thymic Carcinoma: Study Protocol of LOGIK1605/JART‐1501

Thymic carcinoma is a rare epithelial tumor of the thymus with a poor prognosis, and multimodal approaches are important for its treatment. Recently, a number of studies have indicated that S‐1 treatment is effective against thymic carcinoma. S‐1 plus cisplatin with concurrent radiotherapy is a commonly used treatment for other malignancies, including non‐small cell lung cancer (NSCLC). In addition, its safety has been confirmed, and it has been reported to have a marked effect against thymic carcinoma. Therefore, we conducted a phase II study of S‐1 plus cisplatin with concurrent thoracic radiotherapy for locally advanced thymic carcinoma, in which the overall response rate was employed as the primary endpoint. The secondary endpoints were overall survival, progression‐free survival, and safety.