SEER Inquiry System - Report
Produced: 10/31/2025 11:01 AM
Question 20051107
Inquiry Details
References:
#1: SEER*Rx. http://seer.cancer.gov/tools/s
#2: 2004 SEER Manual, 195. March 2006 update
Question:
Discussion:
Answer:
Code Rituxan as chemotherapy. Code 90-Yttrium as radioisotope. Code 131-Iodine as radioisotope when given with Rituxan as treatment for lymphoma.
Zevalin is a monoclonal antibody conjugated to Yttrium 90. Bexxar is a monoclonal antibody conjugated to Iodine 131. In both drugs, the monoclonal antibody is only the delivery agent for the radioisotope. Both drugs should be coded as radioisotopes. The one-two-three punch of Rituxan and zevalin followed by Rituxan and Bexxar should be coded as chemotherapy plus radioisotopes. Zevalin is also used by itself for people who have not responded to Rituxan.
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