Non-Hodgkin lymphoma, NOS
Help me code for diagnosis year :
Most commonly, however, a NOS histology is only the working diagnosis; the physician will run further diagnostic procedures and look for various clinical presentations to identify a more specific disease. Further review of the medical record should be done to look for the tests listed as definitive diagnosis.
When a more specific diagnosis is identified, change the histology to the more definitive term and code. More specific diseases would be any of the specific non-Hodgkin lymphoma histologies.
WHO assigns the non-Hodgkin lymphoma, NOS code to a number of neoplasms. All of these assigned histology code 9591/3:
1. Splenic B-cell lymphoma/leukemia, unclassifiable, a term that describes a number of variably well-defined entities involving the spleen that do not fall into any of the other types of B-cell lymphoid neoplasms. When using this code to describe splenic B-cell lymphoma/leukemia do the necessary text documentation to differentiate this disease from the non-Hodgkin, NOS.
2. Splenic diffuse red pulp small B-cell lymphoma (rare disorder). Diagnosed at clinical stage IV with spleen, BM and PB involvement. Diffuse involvement of the red pulp of the spleen.
3. Hairy cell leukemia-variant. Also has BM and PB involvement.
4. Thrombocytic variant of hairy cell leukemia/hairy cell leukemia variant (Do not confuse with hairy cell leukemia. This neoplasm must be described as a VARIANT.) HCL-v accounts for about 10% of hairy cell leukemia cases. Spleen, BM and PB are involved. Hepatomegaly and lymphadenopathy is uncommon. Involvement of other solid tissue is rare. For hairy cell leukemia variant, code primary site to C421 with histology code 9591/3.
5. Lymphomatosis cerebri is a rare primary central nervous system lymphoma (PCNSL). This disease presents as a diffuse, infiltrating process without the formation of a mass. Radiographs show diffuse white matter involvement without enhancement.