Clinical Endoscopy

Sung Wook Hwang

3 Articles

Endoscopic findings of immune checkpoint inhibitor-related gastrointestinal adverse events: Min Kyu Kim, Sung Wook Hwang; Clin Endosc 2024;57(6):725-734. Published online August 29, 2024; DOI: https://doi.org/10.5946/ce.2024.003

Abstract PDF PubReader ePub: The use of immune checkpoint inhibitors (ICIs) for the treatment of various malignancies is increasing. Immune-related adverse events can occur after ICI administration, with gastrointestinal adverse events constituting a significant proportion of these events. When ICI-related diarrhea/colitis is suspected, endoscopic evaluation is recommended to differentiate it from other etiologies and assess the severity of colitis. The distribution of intestinal inflammation in ICI-related colitis demonstrates a high frequency of extensive colitis (23–86%). However, isolated right-sided colitis (3–8%) and ileitis (2–16%) are less prevalent. Endoscopic findings vary and predominantly encompass features indicative of inflammatory bowel disease, including aphthae, ulcers, diffuse or patchy erythema, mucosal edema, loss of vascular pattern, and friability. The presence of ulcers and extensive intestinal inflammation are associated with a reduced response to treatment. Microscopic inflammation can be observed even in endoscopically normal mucosa, underscoring the need for biopsies of seemingly normal mucosa. Histological findings present with acute/chronic inflammation and occasionally exhibit characteristics observed in inflammatory bowel disease, microscopic colitis, or ischemic colitis. The first-line therapeutic choice for ICI-related diarrhea/colitis with a common terminology criteria for adverse events grade of 2 or above is corticosteroids, whereas infliximab and vedolizumab are recommended for refractory cases.

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Efficacy of Precut Endoscopic Mucosal Resection for Treatment of Rectal Neuroendocrine Tumors: Hoonsub So, Su Hyun Yoo, Seungbong Han, Gwang-un Kim, Myeongsook Seo, Sung Wook Hwang, Dong-Hoon Yang, Jeong-Sik Byeon; Clin Endosc 2017;50(6):585-591. Published online October 12, 2017; DOI: https://doi.org/10.5946/ce.2017.039

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Background
/Aims: Endoscopic resection is the first-line treatment for rectal neuroendocrine tumors (NETs) measuring <1 cm and those between 1 and 2 cm in size. However, conventional endoscopic resection cannot achieve complete resection in all cases. We aimed to analyze clinical outcomes of precut endoscopic mucosal resection (EMR-P) used for the management of rectal NET.
Methods
EMR-P was used to treat rectal NET in 72 patients at a single tertiary center between 2011 and 2015. Both, circumferential precutting and EMR were performed with the same snare device in all patients. Demographics, procedural details, and histopathological features were reviewed for all cases.
Results
Mean size of the tumor measured endoscopically was 6.8±2.8 mm. En bloc and complete resection was achieved in 71 (98.6%) and 67 patients (93.1%), respectively. The mean time required for resection was 9.0±5.6 min. Immediate and delayed bleeding developed in six (8.3%) and 4 patients (5.6%), respectively. Immediate bleeding observed during EMR-P was associated with the risk of delayed bleeding.
Conclusions
Both, the en bloc and complete resection rates of EMR-P in the treatment of rectal NETs using the same snare for precutting and EMR were noted to be high. The procedure was short and safe. EMR-P may be a good treatment choice for the management of rectal NETs.

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Endoscopic mucosal resection using anchored snare Tip-in versus precut technique for small rectal neuroendocrine tumors
Seung Wook Hong, Dong-Hoon Yang, Yoo Jin Lee, Dong Hoon Baek, Jaeyoung Chun, Hyun Gun Kim, Sung Joo Kim, Seung-Mo Hong, Dae-Seong Myung
The Korean Journal of Internal Medicine.2024; 39(2): 238. CrossRef
Risk Factors for Lymph Node Metastasis and Oncologic Outcomes in Small Rectal Neuroendocrine Tumors with Lymphovascular Invasion
Seung-Joo Nam, Byung Chang Kim, Hee Jin Chang, Han Ho Jeon, Junho Kim, Su Young Kim
Gut and Liver.2022; 16(2): 228. CrossRef
EMR-P for small rectal neuroendocrine tumors: is it a preferred treatment?
Zhaohui Liu, Chunsi Zheng, Shihua Ding, Chong Chen, Jingbo Yang, Ruinuan Wu, Dayong Sun
Scandinavian Journal of Gastroenterology.2022; 57(12): 1503. CrossRef
Recurrence after endoscopic resection of small rectal neuroendocrine tumors: a retrospective cohort study
Sukit Pattarajierapan, Supakij Khomvilai
Annals of Coloproctology.2022; 38(3): 216. CrossRef
Endoscopic treatment for rectal neuroendocrine tumor: which method is better?
Seung Min Hong, Dong Hoon Baek
Clinical Endoscopy.2022; 55(4): 496. CrossRef
Diagnosis, treatment, and current concepts in the endoscopic management of gastroenteropancreatic neuroendocrine neoplasms
Giuseppe Iabichino, Milena Di Leo, Monica Arena, Giovanni Giuseppe Rubis Passoni, Elisabetta Morandi, Francesca Turpini, Paolo Viaggi, Carmelo Luigiano, Luca De Luca
World Journal of Gastroenterology.2022; 28(34): 4943. CrossRef
Comparison of conventional and modified endoscopic mucosal resection methods for the treatment of rectal neuroendocrine tumors
Hee Sung Lee, Hee Seok Moon, In Sun Kwon, Jae Ho Park, Ju Seok Kim, Sun Hyung Kang, Eaum Seok Lee, Seok Hyun Kim, Jae Kyu Sung, Byung Seok Lee, Hyun Yong Jeong
Surgical Endoscopy.2021; 35(11): 6055. CrossRef
Diagnosis and Management of Rectal Neuroendocrine Tumors (NETs)
Francesco Maione, Alessia Chini, Marco Milone, Nicola Gennarelli, Michele Manigrasso, Rosa Maione, Gianluca Cassese, Gianluca Pagano, Francesca Paola Tropeano, Gaetano Luglio, Giovanni Domenico De Palma
Diagnostics.2021; 11(5): 771. CrossRef
Anchoring the snare tip is a feasible endoscopic mucosal resection method for small rectal neuroendocrine tumors
Jeongseok Kim, Jisup Kim, Eun Hye Oh, Nam Seok Ham, Sung Wook Hwang, Sang Hyoung Park, Byong Duk Ye, Jeong-Sik Byeon, Seung-Jae Myung, Suk-Kyun Yang, Seung-Mo Hong, Dong-Hoon Yang
Scientific Reports.2021;[Epub] CrossRef
Safety and efficacy of tip‐in endoscopic mucosal resection for large sessile colorectal polyps: A single‐center experience in Taiwan
Chung‐Ying Lee, Ming‐Yao Chen, Hwai‐Jeng Lin, Hsi‐Yuan Chien
Advances in Digestive Medicine.2020; 7(2): 58. CrossRef
Incidental diagnosis of very small rectal neuroendocrine neoplasms: when should endoscopic submucosal dissection be performed? A single ENETS centre experience
Nico Pagano, Claudio Ricci, Nicole Brighi, Carlo Ingaldi, Francesco Pugliese, Donatella Santini, Davide Campana, Cristina Mosconi, Valentina Ambrosini, Riccardo Casadei
Endocrine.2019; 65(1): 207. CrossRef
Clinical outcomes of endoscopic mucosal resection for rectal neuroendocrine tumor
Jihye Kim, Jee Hyun Kim, Joo Young Lee, Jaeyoung Chun, Jong Pil Im, Joo Sung Kim
BMC Gastroenterology.2018;[Epub] CrossRef
Proper Treatment Option for Small Rectal Neuroendocrine Tumors Using Precut Endoscopic Mucosal Resection
Seun Ja Park
Clinical Endoscopy.2017; 50(6): 516. CrossRef

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Multiple Polypoid Angiodysplasia with Obscure Overt Bleeding: Jooyoung Lee, Sung Wook Hwang, Jihye Kim, Jinwoo Kang, Gyeong Hoon Kang, Kyu Joo Park, Jong Pil Im, Joo Sung Kim; Clin Endosc 2016;49(1):91-96. Published online January 28, 2016; DOI: https://doi.org/10.5946/ce.2016.49.1.91

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Angiodysplasia (AD) is increasingly being recognized as a major cause of gastrointestinal bleeding. Morphologically flat lesions are common types of AD, whereas the polypoid types are rare. We report a case of multiple polypoid AD in the small bowel causing severe anemia and requiring surgical treatment. A 60-year-old male patient visited our hospital with dyspnea and hematochezia. He had a history of myocardial infarction and was taking both aspirin and clopidogrel. Capsule endoscopy, enteroscopy, computed tomography, and angiography revealed multifocal vascular lesions with a polypoid shape in the jejunum. Surgical resection was performed because endoscopic treatment was considered impossible with the number and the location of lesions. The risk of recurrent bleeding related to the use of antiplatelet agents also contributed to the decision to perform surgery. AD was histologically diagnosed from the surgical specimen. He resumed taking both aspirin and clopidogrel after surgery. He fully recovered and has been doing well during the several months of follow-up.

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Intraoperative Endoscopic-Guided Bowel Resection for Persistent Gastrointestinal Bleeding Caused by Angiodysplasia: A Case Report and Literature Review
Emily Fellows, Joy Harris, Tania Kibble, Nicholas M. McDonald, Nabeel Azeem, James V. Harmon
The Surgery Journal.2023; 09(04): e112. CrossRef
Ileal angiodysplasia presentation as a bowel obstruction: A case report
Ons Ghdes, Ali Gaja, Ahlem Blel, Hichem Jarraya, Najla Mnif
International Journal of Surgery Case Reports.2017; 39: 301. CrossRef
Solitary Polypoid Angiodysplastic Lesion Mimicking a Tumor in the Jejunum
Abhishek D. Polavarapu, Mayurathan Kesavan, Vivek V. Gumaste, Monika Wrzolek, Elias Purow
ACG Case Reports Journal.2017; 4(1): e83. CrossRef

10,175 View
103 Download
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