Question: 20190052

Status


Final

Category


#1:   Solid Tumor Rules (2018)
#2:   Multiple primaries
#3:   Head & Neck


References


Source 1:   2018 Solid Tumor Rules
pgs:   38
Notes:   Head and Neck, January 2019 update
Source 2:   WHO Class H & N Tumors
pgs:   14-17
Notes:  


Question


Solid Tumor Rules (2018)/Multiple Primaries--Head & Neck: How many primaries are accessioned when a patient is diagnosed with right nasal cavity (C300) invasive nonkeratinizing squamous cell carcinoma (8072/3) in 2015 treated with radiation and excision, followed by a 2019 right nasal cavity (C300) invasive squamous cell carcinoma (NOS, 8070/3)?  See Discussion.



Discussion


Head and Neck Multiple Primary Rule M8 appears to be the first rule that applies to this case and instructs the user to abstract multiple primaries when separate/non-contiguous tumors are on different rows in the appropriate site table (Tables 1-9) in the Equivalent Terms and Definitions. Table 1 (tumors of the nasal cavity) shows Non-keratinizing squamous cell carcinoma and squamous cell carcinoma on different rows making the 2019 case a new primary. Is this correct?



Answer


Abstract two primaries using Head and Neck Solid Tumor Rule M8 when separate/non-contiguous tumors are on different rows in the appropriate site table, in this case, Table 1 Nasal Cavity and Paranasal Sinuses.



History




Last Updated


06/24/2019

Date Finalized


08/29/2019