Lung FNA of an extranodal NK cell/T cell lymphoma, nasal type, showing atypical lymphocytes with Diff-Quik (a) and Papanicolaou (b) stains, ×600. c In situ hybridization in this case demonstrates several EBER-positive malignant lymphocytes. ×600. d Flow cytometry studies of this aspirate show a predominant NK cell/T cell lymphoid population (dark green scatter at the top of the plot) that coexpresses CD7 and CD56.