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SEER Inquiry System - Report
Produced: 11/01/2025 6:43 AM
Question 20220027
Inquiry Details
References:
#1: Subject matter expert
#2: WHO Class Hem & Lymph Tumors. 5th edition
Question:
Reportability/Heme & Lymphoid Neoplasms--CNS: Is ALK-positive histiocytosis, primary site Central Nervous System (CNS), reportable, and is the correct histology code 9750/3? See Discussion.
Discussion:
2022 case: Surgical Pathology Report-spinal cord tumor, biopsies: ALK-positive neoplasm most consistent with ALK-positive histiocytosis.
Answer:
Report this 2022 case of ALK-positive histiocytosis using histology code 9751/3, Langerhans cell histiocytosis, disseminated. Use text fields to document that this is a case of ALK-positive histiocytosis. This term may be assigned a new code once the 5th edition of the Hematopoietic WHO Blue Book is released.
Cancer Site Category:
Brain and CNS, Heme & Lymphoid Neoplasms
Data Item Category:
Histology
Other Category:
Reportability
Year:
2022
