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SEER Inquiry System - Report
Produced: 10/23/2025 6:18 PM
Question 20160055
Inquiry Details
References:
WHO Class Soft Tissue & Bone
Question:
Reportability--Bone: Is an "atypical cartilaginous tumor" reportable? See Discussion.
Discussion:
Patient had a core needle biopsy of the right acetabulum. Final diagnosis on the path report is: Atypical cartilaginous tumor (formerly chondrosarcoma, grade 1).
Is this cell type reportable? If so, is it reportable only because the pathologist recorded clarifying text in parentheses? If the text in the parentheses was not available, is the histology "atypical cartilaginous tumor" reportable?
Answer:
Atypical cartilaginous tumor of bone is not reportable. The WHO terminology is "atypical cartilagenous tumor/chondrosarcoma grade I." WHO classifies this entity as low malignant potential (behavior code /1).
Chondrosarcoma grade II or grade III is reportable based on the WHO classification of malignant (behavior code /3).
