SEER Inquiry System - Question 20140010 Details

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Produced: 10/16/2025 9:08 PM

Question 20140010

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Inquiry Details

References:

Heme & Lymph Manual & DB

Question:

Multiple primaries--Heme & Lymphoid Neoplasms: Is this one primary or two? Follicular lymphoma grade 1 (9695/3) on 8/23/12 from an abdominal lymph node. On 1/6/14 an abdominal lymph node biopsy showed diffuse large b cell lymphoma arising from high grade follicle center cell lymphoma. Patient has been on observation.

Discussion:

Answer:

1st primary, 8/23/12: Follicular lymphoma, grade 1 2nd primary, 1/6/14: Diffuse Large B Cell Lymphoma

Apply the multiple primary rules twice for this case. The 2012 diagnosis is follicular lymphoma. There are two histologies in 2014: diffuse large b cell lymphoma and follicle center cell lymphoma diagnosed at the same time in the same location. This is one primary per rule M4.

Then compare the 2012 diagnosis to the 2014 diagnosis.

Per the Hematopoietic Database, follicular lymphoma (all types) transforms to DLBCL. Per Rule M10, the DLBCL would be a second primary.

Cancer Site Category:

Heme & Lymphoid Neoplasms

Data Item Category:

N/A

Other Category:

Multiple primaries

Year:

2014