-Neurocognitive side effects from cancer treatment, including chemotherapy, immunotherapy, and radiation. -Hematopoietic stem cell transplants (HSCT) patients, cognition, quality of life, survivorship, Graft versus Host disease, and outcomes in transplants. Associations between prevalent genetic polymorphisms that could plausibly influence treatment-related toxicity and neurocognitive outcomes in Hispanic and Non-Hispanic patients undergoing a stem cell transplantation -Barriers to cancer treatment