SEER Inquiry System - Report
Produced: 10/15/2025 1:54 PM
Question 20021011
Inquiry Details
References:
ICD-O-3, 29
Question:
Discussion:
Answer:
For tumors diagnosed prior to 2007:
If the pathologist states this is a malignancy, the case is reportable. Code the Histology field to 9751/3 [Langerhans cell histiocytosis, NOS] and change the Behavior Code from 1 to 3. Code the Primary Site field to skin [C44._].
For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.