Elia Armellini1, Erminia Manfrin2, Elena Trisolini3, Silvano Andorno3, Marco Ballarè1, Laura Bernardoni4, Renzo Luciano Boldorini3,5, Armando Gabbrielli4, Luca Frulloni4, Alberto Larghi6, Pietro Occhipinti1, Aldo Scarpa2,7, Stefano Francesco Crinò4. 1. Department of Gastroenterology, 'Maggiore della Carità' Hospital, Novara, Italy. 2. Department of Pathology and Diagnostics, G.B. Rossi University Hospital, Verona, Italy. 3. Department of Health Sciences, School of Medicine, University of Eastern Piedmont 'Amedeo Avogadro', Novara, Italy. 4. Gastroenterology and Digestive Endoscopy Unit, The Pancreas Institute, G.B. Rossi University Hospital, Verona, Italy. 5. Department of Pathology, 'Maggiore della Carità' Hospital, Novara, Italy. 6. Digestive Endoscopy Unit, IRCCS Fondazione Policlinico Universitario A. Gemelli, Rome, Italy. 7. ARC-Net Research Centre, G.B. Rossi University Hospital, Verona, Italy.
Abstract
Background: Innovative approaches to improve diagnostic yield of endoscopic ultrasound-guided tissue acquisition (EUS-TA) have focused on needle design with development of fine-needle biopsy (FNB) needles with microcore-acquisition technology. Recently, a 20-gauge (20G) antegrade-cutting-side-bevelled biopsy needle (ProCore®) was developed for EUS-TA, but data about its diagnostic performance and histological capability are scant. Objectives: We assessed the diagnostic performance and histologic retrieval rate of a new 20G antegrade-cutting-side-bevelled biopsy needle compared with a 22G reverse-side-bevelled needle for EUS sampling of solid pancreatic lesions. Patients and methods: A retrospective analysis of 238 consecutively collected patients who underwent EUS-TA using a 20G or a 22G ProCore® needle, without rapid on-site evaluation (ROSE), was conducted at two centres.Sensitivity, specificity, positive predictive value and negative predictive value were calculated. Histologic tissue retrieval was evaluated applying a scoring system for each case. Results: Sensitivity and specificity were estimated as 98.4-100% in the 20G-, and 94.9-100% in the 22G-needle groups, respectively (p > 0.99). The 20G procured more histologic-grade tissues (92.6% vs 49.5%, p < 0.0001) achieved by a lower number of passes (2.64 vs 3.44, p < 0.0001) compared to the 22G. Conclusions: Both side-bevelled FNB needles achieved a high diagnostic sensitivity. The 20G-side-bevelled needle obtained a significantly higher microcore retrieval rate.
Background: Innovative approaches to improve diagnostic yield of endoscopic ultrasound-guided tissue acquisition (EUS-TA) have focused on needle design with development of fine-needle biopsy (FNB) needles with microcore-acquisition technology. Recently, a 20-gauge (20G) antegrade-cutting-side-bevelled biopsy needle (ProCore®) was developed for EUS-TA, but data about its diagnostic performance and histological capability are scant. Objectives: We assessed the diagnostic performance and histologic retrieval rate of a new 20G antegrade-cutting-side-bevelled biopsy needle compared with a 22G reverse-side-bevelled needle for EUS sampling of solid pancreatic lesions. Patients and methods: A retrospective analysis of 238 consecutively collected patients who underwent EUS-TA using a 20G or a 22G ProCore® needle, without rapid on-site evaluation (ROSE), was conducted at two centres.Sensitivity, specificity, positive predictive value and negative predictive value were calculated. Histologic tissue retrieval was evaluated applying a scoring system for each case. Results: Sensitivity and specificity were estimated as 98.4-100% in the 20G-, and 94.9-100% in the 22G-needle groups, respectively (p > 0.99). The 20G procured more histologic-grade tissues (92.6% vs 49.5%, p < 0.0001) achieved by a lower number of passes (2.64 vs 3.44, p < 0.0001) compared to the 22G. Conclusions: Both side-bevelled FNB needles achieved a high diagnostic sensitivity. The 20G-side-bevelled needle obtained a significantly higher microcore retrieval rate.
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