Fine needle aspiration cytopathology of malignant lymphoma.

Morphologic features allowing the cytopathologist to distinguish a reactive lymph node from a malignant lymphoproliferative disorder and to distinguish Hodgkin lymphoma from non-Hodgkin lymphoma are presented in concert with pertinent immunophenotypic profiles of various lymphomas. The limitations and diagnostic pitfalls of aspiration cytopathology in the diagnosis of lymphoma and lymphoid aspirates are also discussed.