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Additional Value of FDG-PET/MRI Complementary to Sentinel Lymphonodectomy for Minimal Invasive Lymph Node Staging in Patients with Endometrial Cancer: A Prospective Study

  • 0Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, 72076 Tuebingen, Germany.
Diagnostics (basel, Switzerland) +

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February 24, 2024

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February 24, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Combining [18F]-Fluorodeoxyglucose (FDG) PET/MRI with sentinel lymph node biopsy (SLNB) significantly improves lymph node staging in early endometrial cancer, potentially reducing the need for systematic lymphadenectomy by up to 87%.

Area Of Science

  • Oncology
  • Nuclear Medicine
  • Radiology
  • Gynecologic Oncology

Background

  • Lymph node metastases (LNM) are infrequent in early endometrial cancer.
  • Systematic lymphadenectomy (LNE) is standard for N-staging but is invasive.
  • Less invasive staging methods are needed to avoid morbidity.

Purpose Of The Study

  • To evaluate the benefit of [18F]-Fluorodeoxyglucose (FDG) PET/MRI combined with sentinel lymph node biopsy (SLNB).
  • To assess if this combination offers less invasive N-staging for early endometrial cancer.
  • To compare diagnostic accuracy against standard LNE.

Main Methods

  • Prospective study of 79 early-stage endometrial cancer patients.
  • Whole-body FDG-PET/MRI performed for staging.
  • Sentinel lymph node (SLN) mapping using 99mTc-Nanocolloid SPECT/CT and indocyanine green (ICG) fluoroscopy, followed by LNE as ground truth.

Main Results

  • FDG-PET/MRI showed high specificity (97.2%) but limited sensitivity (66.7%) for N-staging.
  • Combination of SLN mapping and FDG-PET/MRI increased sensitivity to 77.8%.
  • ICG dye improved SLN mapping success to 80% in difficult cases, reducing LNE by up to 87%.
  • FDG-PET/MRI detected para-aortic LNM and one liver metastasis.

Conclusions

  • The combination of FDG-PET/MRI and SLNE reduces the need for diagnostic LNE by up to 87%.
  • PET/MRI complements SLNE, especially for detecting para-aortic LNM and distant metastases.
  • This integrated approach offers a less invasive yet effective N-staging strategy.

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