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. 2023 Jul 20;18:3989–4005. doi: 10.2147/IJN.S417445

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© 2023 Yang et al.

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Representative images of EUS-FNI. (A) The procedure of real-time EUS-FNI. (B) Ultrasonographic images of different formulations during procedure. GEM solution injection resulted in rapid diffusion of a hyperechoic substance throughout the tumor mass. GEM/PPP hydrogel injection produced confined, layered hyperechoic matter near the needle tip. Ethanol injection generated irregularly shaped hyperechoic regions. Polidocanol injection created a limited, spherical hyperechoic area surrounding the needle tip.