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Question: 20130083 Status

Source 1:   Heme & Lymph Manual & DB
Source 2:  

Ambiguous terminology/Histology--Heme & Lymphoid Neoplasms: How is the histology coded if an FNA reveals high grade B-cell lymphoma, compatible with diffuse large B-cell lymphoma, and the treating physician states this is diffuse large B-cell lymphoma? See Discussion.

The FNA showed high grade B-cell lymphoma, morphologically compatible with diffuse large B cell lymphoma. Special studies state: Tumor cells are positive for Vimentin, CD45, and CD20, focally weakly positive for CD43; negative for Myeloperoxidase, CD99, AE1/AE3, CK7, CK20, S100, CD3, cyclin D1, CD34, CD5 and TTF1. The cellular findings and immunophenotype are compatible with large B-cell lymphoma.

The treating physician refers to this disease process and is treating the patient for diffuse large B-cell lymphoma. Should the histology be coded as B-cell lymphoma, NOS (9591/3) because both the FNA and the immunophenotyping use ambiguous terminology? Does the physician reference to the disease process as diffuse large B-cell lymphoma, Stage II-AE impact the histology used?

For cases diagnosed 2010 and forward, access the Hematopoietic Database at

Code the histology to diffuse large B-cell lymphoma [9680/3] because the physician states this is a DLBCL and is treating the patient accordingly. Although the pathology report was only compatible with DLBCL, there was a subsequent clinical diagnosis that confirmed a diagnosis of DLBCL. In addition, the patient was treated for DLBCL.

SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided.


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