Key result
Molecular profiling is necessary to diagnose pediatric CIC-rearranged sarcomas given their highly varied morphology.
Why the study?
CIC-rearranged sarcomas represent a rare and aggressive category of undifferentiated small round cell sarcomas with distinct clinicopathological and molecular features.
This case series expands the morphological and molecular spectrum of pediatric CIC-rearranged sarcomas, highlighting the need for molecular profiling in diagnosis.
May prompt molecular testing for atypical pediatric sarcomas; extends the morphological spectrum but remains hypothesis-generating.
CIC-rearranged sarcomas represent a rare and aggressive category of undifferentiated small round cell sarcomas with distinct clinicopathological and molecular features. This study presents a case series of four pediatric CIC-rearranged sarcomas, including an index case with unusual chondroid and osseous metaplasia and three additional cases demonstrating the clinicopathological spectrum of these tumors. We present four pediatric CIC-rearranged sarcomas, all with CIC::DUX4 fusions confirmed by next-generation sequencing. This series expands the morphological and molecular spectrum of these tumors, underscoring their heterogeneity and the necessity of molecular profiling for diagnosis.
No takes yet. Share an insight, caveat, or question.
Yu et al. (2026) studied this question. Four pediatric CIC-rearranged sarcomas with CIC::DUX4 fusions showed varied morphology, highlighting heterogeneity and need for molecular profiling in diagnosis.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: