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SEER Inquiry System - Report
Produced: 07/20/2025 8:35 AM
Question 20110088
Inquiry Details
References:
2022 SEER Manual
Question:
Chemotherapy/Neoadjuvant treatment: Should neoadjuvant chemotherapy be coded for an incidental second primary discovered at the time of surgery? If so, how is the diagnosis date coded? See Discussion.
Discussion:
The patient had neoadjuvant chemotherapy for rectal carcinoma. An AP resection revealed an incidental second primary intramucosal carcinoma in adenomatous polyp in the descending colon. Is the chemotherapy coded as therapy for the intramucosal carcinoma of the descending colon?
Answer:
Record the neoadjuvant therapy only for the first primary and do not record the neoadjuvant therapy for the incidental new primary found on surgery.
History:
Answer for cases diagnosed prior to 2022
The neoadjuvant chemotherapy is recorded for both primaries.
For the second primary, code the actual diagnosis date and use the date of diagnosis as the date of systemic therapy.
