The White Cell Disorders are organized into four major subtopics: "Benign" Disorders, Leukemia, Lymphoma, and Dysproteinemias and Plasma Cell Disorders as outlined on the previous card.

The "Benign" Disorders section includes both congenital and reactive abnormalities of white cells. Proliferative disorders, including the major malignant hematologic diseases of white cells: leukemia, lymphoma and myeloma, are discussed in the remaining three sections.

Certain proliferative disorders of platelets and of red cells are also considered in the section on proliferative disorders of white cells. Functional disorders of platelets are covered in the Coagulation/Hemostasis unit.