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SEER Inquiry System - Report
Produced: 01/08/2026 3:07 PM
Question 20110012
Inquiry Details
References:
WHO Class Soft Tissue & Bone, 33. 2013
Question:
Reportability--Sarcoma: Is "atypical lipomatous tumor/well-differentiated liposarcoma" reportable? See Discussion.
Discussion:
The final diagnosis for a soft tissue excision is, "atypical lipomatous tumor/well-differentiated liposarcoma". The Comment section states, "Atypical lipomatous tumor/well differentiated liposarcoma has a significant risk for local recurrence, but no metastatic potential."
Per the 2010 SEER Manual, page 3, example 4: The pathologist makes the final decision about the behavior for a particular case. In this case, the pathologist uses both a reportable and a non-reportable term in the final diagnosis and in the comment section of the pathology report. Does the pathologist's comment impact the behavior and reportability of this tumor?
Answer:
For cases diagnosed 1/1/2014 and later: Atypical lipomatous tumor (8850/1) is not reportable. If the pathologist uses the term "well-differentiated liposarcoma" (8851/3) report the case. Use of this terminology indicates a less favorable prognosis.
History:
For cases diagnosed 2007-2013: Atypical lipomatous tumor/well-differentiated liposarcoma is reportable. This terminology comes directly from the WHO Classification of Tumours of Soft Tissue and Bone. According to WHO, atypical lipomatous tumor/WD liposarcoma is a locally aggressive malignant mesenchymal neoplasm.
Cancer Site Category:
N/A
Data Item Category:
N/A
Other Category:
Reportability
Year:
2011
