With the t(4;11) Chromosome Rearrangement: Ultrastructural and Immunologic Characteristics

) chromosome rearrangement is characterized by relatively consistent clinical features: occurrence primarily in young individuals. hyperleukocytosis. and poor response to therapy. This study describes the morphological, ultrastructural, and immunologic characteristics of the leukemic cells from ten patients with this type of leukemia. The morphological features of the leukemic blasts vary from lymphoid