SEER Inquiry System - Question 20021126 Details

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Produced: 01/30/2026 1:50 PM

Question 20021126

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Inquiry Details

References:

#1: SEER Program Code Man, 3rd Ed, 93

#2: SEER EOD-88, 3rd Ed, 36

Question:

EOD-Extension--Head & Neck (Tonsil): How should the EOD-Extension field be coded for bilateral tonsil involvement? See discussion.

Discussion:

Tonsillectomy and bilateral radical neck dissections were done. The path diagnosis was left and right tonsils: squamous cell carcinoma, bilateral tonsils with negative inked surgical margins of resection. Physical exam and operative findings did not mention any extension beyond the tonsils.

We originally coded the EOD-Extension field to 30 for a bilateral tonsil primary. The case failed the SEER Edit IF41 (Primary Site/Lat/EOD). According to that edit, if laterality is 4 then the EOD-Extension field must not be 00 through 30.

We recoded the EOD-Extension field to 99 in order to comply with the SEER edit.

Answer:

For cases diagnosed 1998-2003:

Code EOD extension as 30 [Localized, NOS] and laterality as 4 [Bilateral involvement]. The next update to the SEER edits will allow this combination.

Cancer Site Category:

Head & Neck

Data Item Category:

N/A

Other Category:

N/A

Year:

2002