SEER Inquiry System - Question 20021011 Details

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Produced: 10/16/2025 8:27 PM

Question 20021011

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Inquiry Details

References:

ICD-O-3, 29

Question:

Reportability/Histology (Pre-2007)/Behavior Code/Primary Site: How would you code these fields for a case in which an infant presents with a skin rash, enlarged spleen, palpable abdominal mass, inconclusive bone marrow biopsy and a skin biopsy that was positive for "Langerhans cell histiocytosis"? See discussion.

Discussion:

The pathologist states, "I would consider this case a malignancy, although it does not always behave as such. Lesions in babies often act in a malignant manner."

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.

Cancer Site Category:

N/A

Data Item Category:

Primary site, Histology

Other Category:

Reportability

Year:

2002