2.1.2.7 Patients with evidence of myelodysplasia, leukemia by morphology, immunostains flow cytometry or abnormal cytogenetics on a bone- marrow aspirate or biopsy. The diagnosis of myelodysplasia will be made by an independent investigator of the Laboratory of Pathology, National Cancer Institute (NCI) taking into consideration the totality of the clinical, pathological, flow cytometric and cytogenetic information described in Appendix E and present in a particular individual s evaluation.