A case report: Retroperitoneal dedifferentiated liposarcoma with heterologous myogenic differentiation and testicular metastasis - Report - MDSpire

A case report: Retroperitoneal dedifferentiated liposarcoma with heterologous myogenic differentiation and testicular metastasis

  • By

  • 马, 浩淞

  • Zi, Guo Run

  • Li, Yiqing

  • Xu, Quanlv

  • Ke, Changxing

  • June 22, 2026

  • 0 min

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Clinical Report: Retroperitoneal Dedifferentiated Liposarcoma with Myogenic Differentiation

Background

Dedifferentiated liposarcoma is the most prevalent retroperitoneal soft tissue sarcoma, often presenting diagnostic challenges. The occurrence of testicular metastasis in DDLPS is extremely rare, highlighting the need for precise diagnostic techniques to guide management.

Data Highlights

No numerical data available in the source material.

Key Findings

  • DDLPS is characterized by MDM2 and CDK4 gene co-amplification.
  • Heterologous myogenic differentiation in DDLPS can lead to misdiagnosis as rhabdomyosarcoma.
  • Testicular metastasis from DDLPS is documented in only isolated case reports.
  • Fluorescence in situ hybridization (FISH) analysis is crucial for confirming DDLPS diagnosis.

Clinical Implications

Accurate diagnosis of DDLPS with myogenic differentiation requires expert pathological evaluation and molecular testing.

Conclusion

This case highlights the critical importance of accurate diagnosis in the management of DDLPS to prevent misclassification.

Related Resources & Content

  1. Diagnosis and management of dedifferentiated liposarcoma: A multidisciplinary position statement - ScienceDirect, 2024
  2. Retroperitoneal Lymph Node Dissection for Early Metastatic Testicular Seminoma - The ASCO Post, 2023
  3. Mesorectal Solitary Fibrous Tumor: A Case Report and Review of Transanal Minimally Invasive Surgical Resection Literature - Springer, 2024
  4. Frontiers in Oncology — A Pure Intertubular Testicular Seminoma mimicking a Burned-Out Tumor: a case report
  5. Frontiers in Oncology — Tocilizumab as a novel bridging therapy for surgery in dedifferentiated liposarcoma complicated by paraneoplastic leukemoid reaction, severe anemia, and thrombocytopenia: a case report
  6. Diagnosis and management of dedifferentiated liposarcoma: A multidisciplinary position statement - ScienceDirect
  7. Well-differentiated liposarcomas and dedifferentiated liposarcomas: Systemic treatment options for two sibling neoplasms - ScienceDirect

Original Source(s)

A case report: Retroperitoneal dedifferentiated liposarcoma with heterologous myogenic differentiation and testicular metastasis

  • by 马, 浩淞 , Zi, Guo Run , Li, Yiqing , Xu, Quanlv , Ke, Changxing

  • June 22, 2026

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