SEER Inquiry System - Question 20061075 Details

For cases diagnosed prior to 1/1/2010:

This is one primary. Code the histology according to the original diagnosis, mycosis fungoides. The physician states that this one disease process started as mycosis fungoides and progressed into lymphoma. A physician's statement has priority over other sources in determining the number of hematopoietic primaries.

In October 2006, a committee will begin working on multple primaries among hematopoietic diseases. The committee will provide further guidance on dealing with disease transformation and other issues.

For cases diagnosed 2010 forward, 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.