#1: Summary Stage 2018
Source 1: 2018 Summary Stage
Notes: General Coding Instructions, April 2018
Summary Stage Manual 2018—Lymphoma: SEER Summary Stage 2000 states: For lymphomas, any mention of lymph nodes is indicative of involvement and is used to determine the number and location of lymph node chains involved (see lymphoma scheme). This statement is not in SEER Summary Stage 2018. Does that mean we follow rules #4-7, pages 14-15, under Code 3: Regional Lymph Nodes only, for every site, including lymphoma?
The following statement "Any mention of the terms including fixed, matted, mass in the hilum, mediastinum, retroperitoneum, and/or mesentery, palpable, enlarged, shotty, lymphadenopathy are all regarded as involvement for lymphomas when determining appropriate code," is included in EOD Primary Tumor and is applicable to Summary Stage 2018.
The statement will be added as note 4 to the Lymphoma Summary Stage chapter. This will be included in the 2019 update (estimated release January 2019).