Dedifferentiated liposarcoma with low-grade fibromyxoid sarcoma and inflammatory myofibroblastic tumor: A case report and literature review

This case underscores critical clinical lessons: diagnostic vigilance is paramount when assessing sarcomas with mixed morphological patterns, given that DDLPS may closely mimic IMT or LGFMS. To prevent misdiagnosis, a systematic diagnostic approach radiological, immunohistochemistry, and confirmatory molecular testing is essential. Therapeutic management relies on complete surgical resection, with adjuvant therapy decisions guided by multidisciplinary evaluation. Long-term surveillance remains necessary due to recognized risks of late recurrence in retroperitoneal DDLPS, mandating sustained follow-up.