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SEER Inquiry System - Report
Produced: 05/17/2026 10:46 PM
Question 20190027
Inquiry Details
References:
2018 EOD Manual. General Coding Instructions, March 2018
Question:
EOD 2018/EOD Primary Tumor/Neoadjuvant treatment: If there is no clinical information available and all that is available is the post-neoadjuvant information, is it better to code EOD unknown (999) or use the post-neoadjuvant information to code EOD? See Discussion.
Discussion:
The Extent of Disease (EOD) Manual states: Neoadjuvant (preoperative) therapy: If the patient receives neoadjuvant (preoperative) systemic therapy (chemotherapy, immunotherapy) or radiation therapy, code the clinical information if that is the farthest extension documented. If the post-neoadjuvant surgery shows more extensive disease, code the extension based on the post-neoadjuvant information.
Answer:
Code EOD Primary Tumor using the post neoadjuvant information for this case. Since the only information you have is the post neoadjuvant, code that. EOD combines clinical and pathological information.
