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Surgical Lymph Node Staging in Extremity Rhabdomyosarcoma: The EpSSG RMS 2005 Trial Experience.

Sheila Terwisscha van Scheltinga1, Johannes H M Merks2,3, Florent Guerin4

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Summary
This summary is machine-generated.

Lymph node biopsy is crucial for extremity rhabdomyosarcoma (RMS) staging. Biopsied patients, especially those with positive nodes (N1), show improved survival, highlighting the importance of accurate nodal staging in RMS treatment.

Keywords:
BiopsyExtremityLymph nodesPediatricRhabdomyosarcomaSentinel nodeStaging

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Area of Science:

  • Pediatric Oncology
  • Surgical Oncology
  • Pathology

Background:

  • Extremity rhabdomyosarcoma (RMS) management guidelines recommend lymph node biopsy.
  • The European pediatric soft tissue Sarcoma Study Group (EpSSG) RMS 2005 study provides a framework for evaluating nodal staging techniques.

Purpose of the Study:

  • To analyze and compare the effectiveness of sentinel node biopsy (SNB) and nodal sampling (NS) in extremity RMS.
  • To evaluate the impact of different nodal staging techniques on patient outcomes.

Main Methods:

  • Retrospective analysis of non-metastatic (M0) extremity RMS patients from the EpSSG RMS 2005 study (2005-2016).
  • Inclusion of patients undergoing SNB or NS for clinically negative (cN0) or suspicious nodes.
  • Comparison of nodal upstaging/downstaging rates and overall survival (OS) based on biopsy status and nodal stage.

Main Results:

  • Of 198 patients, 72 with cN0 nodes underwent biopsy (26 SNB, 46 NS), with 15.3% upstaged to pN1.
  • In patients with suspicious nodes, 34 underwent NS, with 26.5% downstaged to N0.
  • Five-year OS was significantly better for biopsied N1 patients (46.5%) compared to non-biopsied N1 patients (p=0.006).

Conclusions:

  • Accurate lymph node staging is critical for guiding treatment decisions in extremity RMS.
  • Nodal pathology can alter the initial clinical or radiological assessment, impacting patient management.
  • Lymph node biopsy, particularly in N1 patients, significantly improves survival outcomes.