Collection of Blood and/or Bone Marrow for Investigation and Characterization of Normal and Abnormal Cell Growth

Inclusion Criteria: * Selected patients over the age of 18 with hematologic malignancies or other blood disorders (leukemia, myeloproliferative disorders, lymphoma, other malignancies involving the bone marrow or patients with unexplained alterations in their complete blood count). Patients who are scheduled to undergo a bone marrow aspirate and/or phlebotomy for other clinical indications will be asked to participate. They will be asked to donate an additional small aliquot of bone marrow and/or blood during the course of their already scheduled bone marrow aspiration or phlebotomy. Exclusion Criteria: * Patients with pre-existing medical conditions that might be exacerbated by the procedure of obtaining bone marrow or blood * Patients who are allergic to Lidocaine, which is used as a local anesthetic, and who cannot receive a suitable substitute anesthetic. * Patients who have a bleeding diathesis which might pose a problem with marrow aspiration. * Patients unable to give informed consent. * Pregnant patients