Study to ONO-4538 in Patients With Rhabdoid Tumor

Inclusion Criteria: 1. Gender: Not specified 2. Age (at the time of consent): 1 year or older 3. Patients who are refractory or intolerant to one or more regimens of chemotherapy for rhabdoid Tumors 4. Patients with advanced or recurrent rhabdoid Tumors not eligible for curative resection Exclusion Criteria: 1. Patients with a history of active concurrent malignancy or complications 2. Patients with spinal lesions expected to require radiation therapy or surgical intervention during the trial period 3. Patients with concomitant central nervous system disorders other than AT/RT that are inadequately controlled or may lead to discontinuation of the investigational drug