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The changing paradigm in EUS-guided tissue acquisition.

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Summary

Endoscopic ultrasound core biopsies can improve cancer diagnosis and molecular marker assessment, potentially eliminating the need for onsite cytopathologists. This method enhances diagnostic accuracy for rare tumors and facilitates targeted cancer therapies.

Keywords:
Core biopsyEndoscopic ultrasoundFine-needle aspirationFine-needle biopsyTissue acquisition

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Area of Science:

  • Gastroenterology
  • Oncology
  • Pathology

Background:

  • Endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) diagnostic accuracy relies heavily on onsite cytopathologist availability.
  • Rare tumors and ancillary testing often necessitate histologic core biopsies, which are not always feasible with EUS-FNA.
  • Evaluating core tissue for molecular markers is crucial for prognostic prediction and targeted cancer chemotherapy.

Purpose of the Study:

  • To evaluate the efficacy of endoscopic ultrasound-guided core tissue procurement.
  • To determine if core biopsies can overcome limitations of fine-needle aspiration cytology.
  • To assess the potential for molecular marker analysis from EUS-obtained core tissue.

Main Methods:

  • Endoscopic ultrasound (EUS) procedures were performed.
  • Core tissue biopsies were obtained during EUS.
  • Diagnostic yield and suitability for ancillary testing were analyzed.

Main Results:

  • Efficient and reliable procurement of core tissue via EUS is achievable.
  • Core biopsies provide accurate tumor diagnosis, including for rare entities.
  • Core tissue is suitable for molecular marker assessment.

Conclusions:

  • EUS-guided core biopsy can eliminate the need for an onsite cytopathologist.
  • This technique improves diagnostic accuracy for challenging cases.
  • EUS-guided core biopsy enables critical molecular marker evaluation for personalized cancer treatment.