SEER Inquiry System - Question 20071020 Details

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Produced: 10/21/2025 8:10 PM

Question 20071020

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Inquiry Details

References:

ICD-O-3 Errata & Clarification, 8. 5/22/2001, #6

Question:

Histology--CLL/SLL: What is the correct histology code for a lymph node described in the pathology report comment section as "phenotypically consistent with chronic lymphocytic leukemia"? See Discussion.

Discussion:

Current rules instruct us to select the lymphoma code for lymph node and/or tissue with the dual diagnosis of chronic lymphocytic leukemia/small lymphocytic lymphoma. We have a cervical lymph node biopsy with that dual diagnosis, however, the pathology comment states that after immunohistochemistry testing, the lymph node is "phenotypically consistent with chronic lymphocytic leukemia." No bone marrow or blood work-up is performed.

Answer:

For cases diagnosed prior to 1/1/2010:Code Small Lymphocytic Lymphoma. The current rules have not changed. Code to lymphoma because the diagnosis was made on a lymph node.

"Phenotypically consistent" means the lymph node contains CLL/SLL, not some other hematopoietic or metastatic disease.

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.

Cancer Site Category:

CLL/SLL

Data Item Category:

Histology

Other Category:

N/A

Year:

2007