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SEER Inquiry System - Report
Produced: 05/14/2026 2:33 PM
Question 20081105
Inquiry Details
References:
#1: 2007 SEER Manual, 71. 3.b.
#2: 2007 SEER Manual, 176
Question:
Discussion:
6/1/2008 cervical lymph node biopsy showed lymphoma. A 6/3/2008 CT Chest/abdomen showed mediastinal and mesenteric lymphadenopathy. A 6/15/2008 tonsillectomy is performed for markedly enlarged right tonsil. Tonsil pathology reveals extensive lymphoma involvement.
Nothing in the chart specifies the primary site.
Should this be a C778 primary because of 3 lymph node areas plus tonsil (a lymphatic organ)? Or should it be coded to C099 Tonsil?
Is this tonsillectomy coded as surgical therapy? If so, is it surgery of primary site or surgery of other site?
Answer:
For cases diagnosed prior to 1/1/2010:Code the primary site to tonsil (C099). This advanced stage lymphoma involves an extranodal site (tonsil) and that site's regional lymph nodes (cervical). The lymphoma has also spread to non-regional lymph nodes (mediastinal and mesenteric). Code the tonsillectomy as surgery of primary site.
For cases diagnosed 1/1/10 and later, refer to the Hematopoietic and Lymphoid Neoplasm Case Reportability and Coding Manual and the Hematopoietic Database (Hematopoietic DB) provided by SEER on its website to research your question. If those resources do not adequately address your issue, submit a new question to SINQ.
