Endoscopic ultrasound elastography in diagnostics of gastroenteropancreatic neuroendocrine tumors

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Introduction: An important role of the endoscopic ultrasound (EUS) was found in the diagnostics of neuroendocrine tumors of the gastrointestinal tract (GEP NETs). In recent years, other modalities have been developed which, in combination with the EUS, improve diagnostics and allow prediction of the tumor's biological behaviour. Such methods include elastography (EG). EG is based on demonstrating the difference in tissue stiffness between tumor and reference area.

Aim(s): To find a typical image, strain ratio (SR) and strain histogram (SH) of GEP NET in endoscopic elastographic measurement using strain qualitative and semi-quantitative methods.

Materials and methods: In our prospective pilot study, patients with tumors of the stomach, duodenum and pancreas were examined. For the evaluation of the qualitative picture we used the 4-stage EG image rating scale. SR was obtained by comparing subendothelial tumor with the stomach or duodenal wall, pancreatic NETs were compared with the unaffected pancreatic tissue.

Conference: 18th Annual ENETS Concerence (2021)

Presenting Author:

Authors: Uhrík P, Smolár M, Huťka Z, Nosakova L, Ďuríček P,

Keywords: endosonography, elastography, neuroendocrine tumor,