Endoscopic Ultrasound-Guided Sampling Techniques in Pancreatic Diagnostics

Endoscopic ultrasound (EUS) has transformed the evaluation of pancreatic disease by combining high-resolution imaging with targeted tissue acquisition. Two principal approaches—fine-needle aspiration (EUS-FNA) and fine-needle biopsy (EUS-FNB)—allow cytological and histological assessment of solid and cystic lesions, while adjunctive methods such as contrast enhancement and elastography improve lesion characterisation in real time. Advances in needle design have yielded gauges and tip geometries that balance tissue yield against procedural safety and flexibility. Rapid on-site evaluation of specimens and molecular assays, including next-generation sequencing, further refine diagnostic accuracy and inform personalised management. Collectively, these techniques support early detection of malignancy, differentiation from inflammatory masses and enable precise staging, with global implications for the timely delivery of curative or palliative therapies.

Research from Nature Portfolio

A comprehensive meta-analysis of endoscopic ultrasound-guided core biopsy demonstrated that EUS-FNB reliably differentiates malignant from benign pancreatic masses, with a pooled sensitivity of 84% and specificity of 98%. The large-scale review confirmed that histological core specimens, preserved for grading and biomarker studies, yield robust diagnostic odds ratios and support molecular profiling without the need for multiple passes or additional procedures. Subgroup analysis indicated consistent performance across study settings, lesion locations and the presence or absence of on-site cytopathology, underlining the broad applicability of core biopsy in routine and specialist centres.

Endoscopic Ultrasound-Guided Sampling Techniques in Pancreatic Diagnostics publication trend

The graph below shows the total number of articles in endoscopic ultrasound-guided sampling techniques in pancreatic diagnostics across all publications each year (not limited to Nature Index journals).

Technical terms

Endoscopic ultrasound (EUS): A minimally invasive procedure combining endoscopy and ultrasound to visualise and sample pancreatic tissue.

Fine-needle aspiration (EUS-FNA): A technique using thin needles to extract cellular material for cytological analysis.

Fine-needle biopsy (EUS-FNB): An approach employing specially designed needles to procure core tissue for histology and molecular studies.

Contrast-enhanced EUS: Imaging modality using ultrasound contrast agents to delineate vascular patterns within pancreatic lesions.

Elastography: Ultrasound method that assesses tissue stiffness to differentiate malignant from benign masses.

Rapid on-site evaluation (ROSE): Immediate cytological assessment of specimens during EUS to judge adequacy and reduce repeat procedures.

References

1. Endoscopic ultrasound-guided fine needle core biopsy for the diagnosis of pancreatic malignant lesions: a systematic review and Meta-Analysis. Scientific Reports (2016).
2. Endoscopic ultrasound-guided sampling of solid pancreatic masses: 22-gauge aspiration versus 25-gauge biopsy needles. BMC Gastroenterology (2015).
3. Rapid On-Site Evaluation Does Not Improve Endoscopic Ultrasound-Guided Fine Needle Aspiration Adequacy in Pancreatic Masses: A Meta-Analysis and Systematic Review. PLOS ONE (2016).
4. Targeted next generation sequencing of endoscopic ultrasound acquired cytology from ampullary and pancreatic adenocarcinoma has the potential to aid patient stratification for optimal therapy selection. Oncotarget (2016).