Chronic Monocytic Leukemia

The purpose of this study is to determine if hyperbaric oxygen therapy is safe in the setting of stem cell transplantation. This study will also determine if hyperbaric oxygen therapy improves engraftment, graft versus host disease, neutrophil count, and incidence and severity of mucositis (inflammation of the mouth or gut) and infection. This study has two cohorts. The first cohort is subjects with acute myeloid leukemia (AML) or Myelodysplastic Syndrome (MDS). The second cohort is subjects with chronic myelomonocytic leukemia (CMML), atypical chronic myeloid leukemia (aCML), chronic monocytic leukemia, chronic neutrophilic leukemia (CNL), myelofibrosis, and myelodysplastic/myeloproliferative (MDS/MPN) overlap syndrome. The first cohort has completed the recruitment so only the second cohort will be recruited.

This phase II trial studies how well naive T-cell depletion works in preventing chronic graft-versus-host disease in children and young adults with blood cancers undergoing donor stem cell transplant. Sometimes the transplanted white blood cells from a donor attack the body's normal tissues (called graft versus host disease). Removing a particular type of T cell (naive T cells) from the donor cells before the transplant may stop this from happening.