Skip to main content
. Author manuscript; available in PMC: 2023 Jul 1.
Published in final edited form as: Surg Oncol Clin N Am. 2022 May 31;31(3):321–340. doi: 10.1016/j.soc.2022.03.001

Table 3.

Select updates to concepts in nomenclature, grading, and risk stratification (modified from: Kallen ME, Hornick JL. The 2020 WHO Classification: What’s New in Soft Tissue Tumor Pathology? Am J Surg Pathol. 2021;45(1):e1-e23.).3

Key Revision to Nomenclature, Grading, and Risk Stratification
Malignant Melanotic Nerve Sheath Tumor (MMNST):

  • Formerly “melanotic schwannoma”; change in nomenclature to reflect aggressive clinical behavior

Dedifferentiated Liposarcoma (DDLPS):

  • Recognition of adverse prognostic impact of high FNCLCC grade and myogenic (specifically rhabdomyoblastic) differentiation

Solitary fibrous tumor (SFT):

  • New prognostic model predicting metastatic risk based on patient age, mitotic rate, tumor size, and necrosis