Ex Vivo Drug Sensitivity Testing and Multi-Omics Profiling

Inclusion Criteria: * Patients aged 21 years or younger at the time of enrollment on this study of any gender, race or ethnicity. Subjects with suspected or confirmed diagnosis of recurrent or refractory cancer Subjects who are scheduled for or have recently had biopsy or tumor excised (solid tumors) or bone marrow aspirate (blood cancers) Subjects willing to have a blood draw or buccal swab done for the purposes of genetic testing Subjects or their parents or legal guardians willing to sign informed consent Subjects aged 7 to 17 willing to sign assent Exclusion Criteria: * Subjects who do not have malignant tissue available and accessible The amount of excised malignant tissue is not sufficient for the ex vivo drug testing and/or genetic profiling. Patients with newly diagnosed tumors and tumors that have high (\>90%) cure rate with safe standard therapy.