SEER Inquiry System - Question 20130051 Details

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SEER Inquiry System - Report

Produced: 02/22/2026 6:42 AM

Question 20130051

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Inquiry Details

References:

Heme & Lymph Manual & DB

Question:

Multiple primaries--Heme & Lymphoid Neoplasms: How many primaries are accessioned when biopsies of the left and right tonsils show diffuse large B-cell lymphoma and there is no other evidence of involvement? See Discussion.

Discussion:

Scans are negative for lymphadenopathy and the bone marrow biopsy was benign. Radiation Oncology staged this as localized bilateral tonsil primary lymphoma.

Answer:

For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

This case should be accessioned as a single primary, diffuse large B-cell lymphoma [9680/3] of bilateral tonsils. Per Rule M2, a single histology is a single primary. Note 1 for Rule M2 states bilateral involvement of lymph nodes and/or organs is still a single primary.

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. https://educate.fhcrc.org/LandingPage.aspx.

Cancer Site Category:

Heme & Lymphoid Neoplasms

Data Item Category:

N/A

Other Category:

Multiple primaries

Year:

2013