EFSUMB Guidelines on Interventional Ultrasound (INVUS), Part IV EUS-guided Interventions: General aspects and EUS-guided sampling (Long Version) EFSUMB Leitlinien interventioneller Ultraschall (INVUS), Teil IV Endosonografisch gestützte Interventionen: allgemeine Aspekte und endosonografisch gestützte Materialgewinnung (Langversion)

The fourth part of the European Federation of Societies for Ultrasound in Medicine and Biology (EFSUMB) Guidelines on Interventional Ultrasound describes general aspects of endoscopic ultra- sound-guided diagnostic and therapeutic inter- ventions and assesses the evidence for endoscopic ultrasound-guided sampling. Endoscopic ultra- sound combines the most advanced high-resolu- tion ultrasound imaging of lesions within the wall and in the vicinity of the gastrointestinal tract and safe and effective fine needle based tissue acquisi- tion from these lesions. The guideline addresses the indications, contraindications, techniques, ad- verse events, training and clinical impact of EUS- guided sampling. Advantages and drawbacks are weighed in comparison with image-guided percu- taneous biopsy. Based on the most current evi- dence, clinical practice recommendations are given for crucial preconditions and steps of EUS-guided sampling as well as for safe performance. Addition- ally, the guideline deals with the principles and re- liability of cytopathological reporting in endo- scopic ultrasound-guided sampling (long version).