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 chemotherapyfor rhabdoid Tumors

4. Patients with advanced or recurrent rhabdoid Tumors not eligible for curativeresection

Exclusion Criteria:

1. Patients with a history of active concurrent malignancy or complications

2. Patients with spinal lesions expected to require radiation therapy or surgicalintervention during the trial period

3. Patients with concomitant central nervous system disorders other than AT/RT that areinadequately controlled or may lead to discontinuation of the investigational drug