Why the study?
Anomalous tumour recurrence timing and unusual histologic features in retroperitoneal dedifferentiated liposarcoma raise questions regarding its biological behaviour, clinical course, and clinical management.
This case report highlights an unusual late recurrence (>10 years) of dedifferentiated liposarcoma with histological grade progression, raising questions about its biological behavior.
May prompt extended surveillance after dedifferentiated liposarcoma; hypothesis-generating for late recurrence biology and grade progression.
Introduction: Dedifferentiated liposarcoma (DDLPS) is a rare mesenchymal neoplasm that accounts for approximately 20% of soft tissue sarcomas in the human body. This case report emphasises a high-grade DDLPS with a retroperitoneal location and its unexpected recurrence in a 72-year-old male patient more than 10 years after the primary tumour. This case is particularly significant because of the anomalous presentation of the tumour recurrence time that is complemented by the unusual histologic features of the initial neoplasm, which raises new questions about the biological behaviour of the disease, the clinical course and the management of this pathology. Expected results: The report seeks to highlight the important and unusual aspects of the pathology that can contribute to a better understanding of its evolution, allowing informed clinical decisions to improve the patient's quality of life and prognosis.
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Giraldo et al. (2025) studied this question.
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