- Have a diagnosis of relapsed or refractory Mantle Cell Lymphoma (MCL) according to the World Health Organization (WHO) classification that has relapsed after, or been refractory to, available standard treatments. However, participants who are intolerant of, or unable to receive a standard treatment are not required to have MCL that has relapsed after, or been refractory to, that specific standard treatment. Pathology must be reviewed and confirmed at the investigational site where participant is entered prior to enrollment