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Kosuke Okuwaki 3 Articles
Stereomicroscopic on-site evaluation in endoscopic ultrasound-guided tissue acquisition of upper gastrointestinal subepithelial lesions
Seigo Nakatani, Kosuke Okuwaki, Masafumi Watanabe, Hiroshi Imaizumi, Tomohisa Iwai, Takaaki Matsumoto, Rikiya Hasegawa, Hironori Masutani, Takahiro Kurosu, Akihiro Tamaki, Junro Ishizaki, Ayana Ishizaki, Mitsuhiro Kida, Chika Kusano
Clin Endosc 2024;57(1):89-95.   Published online April 18, 2023
DOI: https://doi.org/10.5946/ce.2022.288
Graphical AbstractGraphical Abstract AbstractAbstract PDFPubReaderePub
Background
/Aims: In stereomicroscopic sample isolation processing, the cutoff value (≥4 mm) of stereomicroscopically visible white cores indicates high diagnostic sensitivity. We aimed to evaluate endoscopic ultrasound-guided tissue acquisition (EUS-TA) using a simplified stereomicroscopic on-site evaluation of upper gastrointestinal subepithelial lesions (SELs).
Methods
In this multicenter prospective trial, we performed EUS-TA using a 22-gauge Franseen needle in 34 participants with SELs derived from the upper gastrointestinal muscularis propria, requiring pathological diagnosis. The presence of stereomicroscopically visible white core (SVWC) in each specimen was assessed using stereomicroscopic on-site evaluation. The primary outcome was EUS-TA’s diagnostic sensitivity with stereomicroscopic on-site evaluation based on the SVWC cutoff value (≥4 mm) for malignant upper gastrointestinal SELs.
Results
The total number of punctures was 68; 61 specimens (89.7%) contained stereomicroscopically visible white cores ≥4 mm in size. The final diagnoses were gastrointestinal stromal tumor, leiomyoma, and schwannoma in 76.5%, 14.7%, and 8.8% of the cases, respectively. The sensitivity of EUS-TA with stereomicroscopic on-site evaluation based on the SVWC cutoff value for malignant SELs was 100%. The per-lesion accuracy of histological diagnosis reached the highest level (100%) at the second puncture.
Conclusions
Stereomicroscopic on-site evaluation showed high diagnostic sensitivity and could be a new method for diagnosing upper gastrointestinal SELs using EUS-TA.

Citations

Citations to this article as recorded by  
  • What method can we choose if rapid on-site evaluation is not available for the endoscopic ultrasound-guided tissue acquisition of upper gastrointestinal subepithelial lesions?
    Yu Kyung Cho
    Clinical Endoscopy.2024; 57(1): 53.     CrossRef
  • Endoscopic Ultrasound-Guided Tissue Acquisition Using Fork-Tip Needle for Subepithelial Lesions: A Single-Center Validation Study
    Masafumi Watanabe, Kosuke Okuwaki, Tomohisa Iwai, Mitsuhiro Kida, Hiroshi Imaizumi, Kai Adachi, Akihiro Tamaki, Junro Ishizaki, Taro Hanaoka, Chika Kusano
    Digestive Diseases and Sciences.2024;[Epub]     CrossRef
  • An Esophageal Leiomyoma with Cystic Degeneration Mimicking a Malignant Neoplasm
    Gwang Ha Kim, Dong Chan Joo, Moon Won Lee, Bong Eun Lee, Kyungbin Kim
    The Ewha Medical Journal.2023;[Epub]     CrossRef
  • 1,915 View
  • 146 Download
  • 3 Web of Science
  • 3 Crossref
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Cholecystitis after Placement of Covered Self-Expandable Metallic Stents in Patients with Distal Malignant Biliary Obstructions
Masafumi Watanabe, Kosuke Okuwaki, Jun Woo, Mitsuhiro Kida, Hiroshi Imaizumi, Tomohisa Iwai, Hiroshi Yamauchi, Toru Kaneko, Rikiya Hasegawa, Takahiro Kurosu, Naoki Minato, Hiroki Haradome, Wasaburo Koizumi
Clin Endosc 2021;54(4):589-595.   Published online November 17, 2020
DOI: https://doi.org/10.5946/ce.2020.136
AbstractAbstract PDFPubReaderePub
Background
/Aims: Cholecystitis can occur after the placement of covered self-expandable metallic stents for distal malignant biliary obstructions. We aimed to identify risk factors for cholecystitis following covered self-expandable metallic stent placement.
Methods
We investigated risk factors related to cholecystitis following covered self-expandable metallic stent placement in 118 patients with distal malignant biliary obstructions between January 1, 2015 and April 30, 2019. Endoscopic assessments and tumor invasion to the arteries feeding the gallbladder were determined by a pancreaticobiliary endoscopist and a radiologist, respectively.
Results
The median patient age was 72 years (men, 61.0%). The flow of the contrast agent into the gallbladder and tumor involvement in the orifice of the cystic duct were observed in 35 (29.7%) and 35 (29.7%) patients, respectively. During the observation period (median, 179 days), cholecystitis occurred in 18 (15.3%) patients. Multivariate analysis revealed the flow of the contrast agent into the gallbladder (p=0.023) and tumor involvement in the orifice of the cystic duct (p=0.005) as significant independent risk factors associated with cholecystitis.
Conclusions
The flow of the contrast agent into the gallbladder and tumor involvement in the orifice of the cystic duct are potential independent risk factors for cholecystitis following the placement of covered self-expandable metallic stents. A follow-up prospective study is warranted to validate their influence.

Citations

Citations to this article as recorded by  
  • Adverse events of self-expandable metal stent placement for malignant distal biliary obstruction: a large multicenter study
    Takashi Tamura, Takuo Yamai, Norimitsu Uza, Tomoaki Yamasaki, Atsuhiro Masuda, Fumimasa Tomooka, Hirotsugu Maruyama, Minoru Shigekawa, Takeshi Ogura, Katsutoshi Kuriyama, Masanori Asada, Hisakazu Matsumoto, Mamoru Takenaka, Koichiro Mandai, Yui Osaki, Ken
    Gastrointestinal Endoscopy.2024; 99(1): 61.     CrossRef
  • Fully covered versus partially covered self-expandable metal stents for palliation of distal malignant biliary obstruction: a systematic review and meta-analysis
    Giuseppe Vanella, Chiara Coluccio, Alessandro Cucchetti, Roberto Leone, Giuseppe Dell’Anna, Paolo Giuffrida, Carmela Abbatiello, Cecilia Binda, Carlo Fabbri, Paolo Giorgio Arcidiacono
    Gastrointestinal Endoscopy.2024; 99(3): 314.     CrossRef
  • Endoscopic Ultrasound–Guided vs Endoscopic Retrograde Cholangiopancreatography–Guided Biliary Drainage as Primary Approach to Malignant Distal Biliary Obstruction: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
    Harishankar Gopakumar, Ritu Raj Singh, Vakya Revanur, Rajanikanth Kandula, Srinivas R. Puli
    American Journal of Gastroenterology.2024;[Epub]     CrossRef
  • Cholecystitis in patients with a fully covered self-expandable metal stent with and without externally anchored plastic stents
    José Miguel Jiménez-Gutiérrez, Félix Téllez-Avila
    Endoscopy.2024; 56(04): 317.     CrossRef
  • Risk factors and treatment strategies for cholecystitis after metallic stent placement for malignant biliary obstruction: a multicenter retrospective study
    Akihiro Matsumi, Hironari Kato, Taiji Ogawa, Toru Ueki, Masaki Wato, Masakuni Fujii, Tatsuya Toyokawa, Ryo Harada, Yuki Ishihara, Masahiro Takatani, Hirofumi Tsugeno, Naoko Yunoki, Takeshi Tomoda, Toshiharu Mitsuhashi, Motoyuki Otsuka
    Gastrointestinal Endoscopy.2024; 100(1): 76.     CrossRef
  • Covered versus uncovered double bare self-expandable metal stent for palliation of unresectable extrahepatic malignant biliary obstruction: a randomized controlled multicenter trial
    Se Woo Park, Kyong Joo Lee, Moon Jae Chung, Jung Hyun Jo, Hee Seung Lee, Jeong Youp Park, Seung Woo Park, Si Young Song, Huapyong Kang, Eui Joo Kim, Yeon Suk Kim, Jae Hee Cho, Seungmin Bang
    Gastrointestinal Endoscopy.2023; 97(1): 132.     CrossRef
  • Risk factors for early and late cholecystitis after covered metal stent placement for distal biliary obstruction
    Tatsuya Ishii, Tsuyoshi Hayashi, Hajime Yamazaki, Risa Nakamura, Kosuke Iwano, Ryo Ando, Haruka Toyonaga, Toshifumi Kin, Kuniyuki Takahashi, Akio Katanuma
    Journal of Hepato-Biliary-Pancreatic Sciences.2023; 30(10): 1180.     CrossRef
  • Efficacy and complications of inoperable malignant distal biliary obstruction treatment by metallic stents: fully covered or uncovered?
    Jiangning Gu, Xiaoyi Guo, Yong Sun, Bin Fan, Haoran Li, Ting Luo, Haifeng Luo, Jiao Liu, Feng Gao, Yuan Gao, Guang Tan, Xiaoming Liu, Zhuo Yang
    Gastroenterology Report.2022;[Epub]     CrossRef
  • Endoscopic Management of Pancreatobiliary Malignancies
    Dong Wook Lee, Eun Young Kim
    Digestive Diseases and Sciences.2022; 67(5): 1635.     CrossRef
  • 5,432 View
  • 154 Download
  • 8 Web of Science
  • 9 Crossref
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Effectiveness of endoscopic ultrasound-guided tissue acquisition with stereomicroscopic on-site evaluation for preoperative diagnosis of resectable or borderline resectable pancreatic cancer: a prospective study
Junro Ishizaki, Kosuke Okuwaki, Masafumi Watanabe, Hiroshi Imaizumi, Tomohisa Iwai, Rikiya Hasegawa, Takahiro Kurosu, Masayoshi Tadehara, Takaaki Matsumoto, Kai Adachi, Taro Hanaoka, Mitsuhiro Kida, Chika Kusano
Received October 25, 2023  Accepted January 15, 2024  Published online May 24, 2024  
DOI: https://doi.org/10.5946/ce.2023.277    [Epub ahead of print]
Graphical AbstractGraphical Abstract AbstractAbstract PDFPubReaderePub
Background
/Aims: To validate endoscopic ultrasound-guided tissue acquisition (EUS-TA) used in conjunction with stereomicroscopic on-site evaluation (SOSE) as a preoperative diagnostic tool for resectable pancreatic cancer (R-PC) and borderline resectable PC (BR-PC).
Methods
Seventy-eight consecutive patients who underwent EUS-TA for suspected R-PC or BR-PC were enrolled. The primary endpoint was the sensitivity of EUS-TA together with SOSE based on the stereomicroscopically visible white core (SVWC) cutoff value. One or two sites were punctured by using a 22-gauge biopsy needle for EUS-TA, based on the SOSE findings.
Results
We collected 99 specimens from 56 and 22 patients with R-PC and BR-PC, respectively. Based on the SOSE results, we performed 57 procedures with one puncture. The SVWC cutoff values were met in 73.7% and 73.1% of all specimens and in those obtained during the first puncture, respectively. The final diagnoses were malignant and benign tumors in 76 and two patients, respectively. The overall sensitivity, specificity, and accuracy of EUS-TA for the 78 lesions were 90.8%, 100%, and 91.0%, respectively. The sensitivity for malignant diagnosis based on the SVWC cutoff value were 89.5% and 90.4% for the first puncture and all specimens, respectively.
Conclusions
The sensitivity of EUS-TA in conjunction with SOSE for malignancy diagnosis in patients with suspected R-PC or BR-PC was 90.4%.
  • 1,481 View
  • 56 Download
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