Key result
Gastric CIC-DUX4 sarcoma requires genomic profiling and shows rapid chemoresistance to Ewing sarcoma regimens.
Gastric CIC-DUX4 rearranged sarcoma is highly aggressive and diagnostically challenging, requiring comprehensive genomic profiling for confirmation.
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Emphasizes early genomic profiling in aggressive gastric sarcomas; leaves open targeted therapies beyond Ewing regimens.
This case highlights that gastric CIC‐DUX4 rearranged sarcoma is highly aggressive and diagnostically challenging. Early comprehensive genomic profiling was essential for confirming this rare subtype. Despite transient responses to Ewing sarcoma regimens, rapid chemoresistance was observed, emphasizing the need for precise molecular diagnosis and novel therapeutic approaches.
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Hasegawa et al. (2026) studied this question. Gastric CIC-DUX4 rearranged sarcoma is a highly aggressive tumor that requires comprehensive genomic profiling for diagnosis and exhibits rapid chemoresistance to Ewing sarcoma regimens.
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