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Journal Article
A case of successful transluminal drainage of walled-off necrosis under contrast-enhanced harmonic endoscopic ultrasonography guidance.
Journal of Medical Ultrasonics 2018 January
We report a case of successful transluminal drainage of walled-off necrosis (WON) under contrast-enhanced harmonic endoscopic ultrasonography (CH-EUS) guidance. Recently, EUS-guided transluminal drainage (EUS-TD) of WON has been increasingly used as a minimally invasive treatment option with reportedly high technical and clinical success rates; however, B-mode EUS occasionally fails to depict the target lesion and its margins, particularly in cases where the target shows a heterogeneous echogenicity. In our case, EUS-TD was attempted for infected WON, but visualization using B-mode EUS imaging was poor. Thus, CH-EUS was performed to enhance the contrast between the targeted WON and its surrounding tissues. Immediately after injecting a sonographic contrast agent, WON and its margins were clearly identified as an avascular area and were punctured under CH-EUS guidance. CH-EUS enables the assessment of the microvasculature and hemodynamics of the target lesion in real time. It may also provide valuable information and could be a useful modality for EUS-TD to clearly visualize target lesions and their margins and to decisively puncture them, even when they could not be identified using B-mode EUS.
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