sentences:  Reactive histiocytes displaying hemophagocytosis can be seen interspersed in the neoplastic infiltrate.Leukemic involvement of organs is typically destructive on tissue sections with necrosis and possibly angioinvasion, and the monotonous infiltrate may be diffuse or patchy.The immunophenotype of this disease is the same as extranodal NK/T-cell lymphoma, nasal type and is shown in the table below.