Book 4 - Self Instructional Manual for Cancer Registrars - SEER ...

DETERMINATION OF SUBSEQUENT PRIMARIES OFLYMPHATIC (NODAL AND EXTRANODAL) AND HEMATOPOIETIC DISEASESFirst Primary Presumably a Second Presumably NOT aSubsequent Primary Subsequent Primary(only One Primary)Leukemia, NOS (9800) Non-Hodgkin's Any leukemia 2 (9800-9941)lymphoma 1 (9590-9595,9670-9687, 9690-9698, Sezary's disease 3 (9701)9702-9714)Hodgkin's disease(9650-9667)Mycosis fungoides (9700)Malignant histiocytosis orLetterer-Siwe's disease(9720, 9722)True histiocytic lymphoma(9723)Plasmacytoma or multiplemyeloma (9731, 9732)Mast cell tumor (9740,9741)Waldenstrom'smacroglobulinemia (9761)1If the diagnosis includes "can't rule out leukemia" or "consistent with chronic lymphocyticleukemia," and a bone marrow or peripheral blood study within two months confirms the chroniclymphocytic leukemia diagnosis; then code only to chronic lymphocytic leukemia (9823/3). If notconfirmed as chronic lymphocytic leukemia, then code as the lymphoma.2Note: Leukemia, NOS (9800) should be upgraded to a more specific leukemia diagnosis(higher number) when it is found but not considered a second primary.3presumably this is the correct diagnosis. Code the case to this histology.458