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SEER Inquiry System - Report
Produced: 09/17/2025 8:43 PM
Question 20130134
Inquiry Details
References:
#1: Heme & Lymph Manual & DB
#2: ICD-O-3 update. 2018
Question:
Reportability--Heme & Lymphoid Neoplasms: According to the hematopoietic database, systemic mastocytosis is reportable; does that include INDOLENT systemic mastocytosis (which is not listed in the list of alternative names)?
Discussion:
Answer:
For cases diagnosed 2018 and forward, indolent systemic mastocytosis is not reportable (9741/1). Smoldering systemic mastocytosis is reportable (9741/3).
History:
For cases diagnosed 2010 - 2017
For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.
Report as systemic mastocytosis.
The term "indolent" indicates the symptoms and signs of the disease are not clinically obvious yet. "Indolent" or "not indolent" has nothing to do with the histology type.
SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx.
