Masashi Oka

Social Insurance Saitama Chuo Hospital — Japan

Medicine · Health Sciences

31h-index4.9kcitations151works0.02yr avg
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Research Topics

Gastric Cancer Management and Outcomes(47), Helicobacter pylori-related gastroenterology studies(41), Gastrointestinal Tumor Research and Treatment(21), Metastasis and carcinoma case studies(21), Esophageal and GI Pathology(16)

Publications151 total

Relationship Between Angiogenesis and Hypoxia-inducible Factor-1α and Erythropoietin in Superficial Esophageal Carcinoma
Anticancer Research·2025
Relationship between angiogenesis and hypoxia-inducible factor-1α and erythropoietin in superficial esophageal carcinoma
2024Open Access
Usefulness of Intraductal Placement of a Dumbbell-Shaped Fully Covered Self-Expandable Metal Stent for Post-Cholecystectomy Bile Leaks
Journal of Clinical Medicine·2023· 5 citedOpen Access
Endoscopic Ultrasound-Guided Gastrojejunostomy for Malignant Afferent Loop Syndrome Using a Fully Covered Metal Stent: A Multicenter Experience
Journal of Clinical Medicine·2023· 5 citedOpen Access
A novel tapered plastic stent with an ultrafine delivery system for one-step endoscopic ultrasound-guided hepaticogastrostomy
Endoscopy·2023· 3 citedOpen Access
Removal of a small pancreatic stone in thin main pancreatic duct using an ultrafine balloon catheter (with video)
Journal of Hepato-Biliary-Pancreatic Sciences·2022· 1 cited
The Feasibility of Whole-Liver Drainage with a Novel 8 mm Fully Covered Self-Expandable Metal Stent Possessing an Ultra-Slim Introducer for Malignant Hilar Biliary Obstructions
Journal of Clinical Medicine·2022· 4 citedOpen Access
Practical Tips for Safe and Successful Endoscopic Ultrasound-Guided Hepaticogastrostomy: A State-of-the-Art Technical Review
Journal of Clinical Medicine·2022· 29 citedOpen Access
Endoscopic ultrasound-guided one-step antegrade metal stent placement with an ultra-slim introducer for preoperative biliary drainage
Endoscopy·2021· 3 citedOpen Access
Rotatable sphincterotome as a salvage for guidewire manipulation in endoscopic ultrasound‐guided hepaticogastrostomy
Digestive Endoscopy·2021· 3 citedOpen Access
Transmural cystoscopy with an ultra-slim basket for migrated stent removal after endosonography-guided hepatic cyst drainage
Endoscopy·2021
Radiofrequency ablation of hyperplasia at an uncovered portion of a partially covered metal stent in endoscopic ultrasound‐guided hepaticogastrostomy (with video)
Journal of Hepato-Biliary-Pancreatic Sciences·2021· 3 cited
Necrosectomy with an ultra‐slim endoscope for gangrenous cholecystitis refractory to endoscopic ultrasound‐guided gallbladder drainage
Digestive Endoscopy·2021
Interventional EUS for Pancreatic Cancer and Cholangiocarcinoma
2021· 1 cited
A Proposed Algorithm for Endoscopic Ultrasound-Guided Rendezvous Technique in Failed Biliary Cannulation
Journal of Clinical Medicine·2020· 22 citedOpen Access
Guidelines for endoscopic submucosal dissection and endoscopic mucosal resection for early gastric cancer (second edition)
Digestive Endoscopy·2020· 460 cited
[Identification of gastric cancer high-risk by serum tests -current status and issues].
PubMed·2020
Tu1514 ANALYSIS OF METACHRONOUS GASTRIC CANCER AFTER ENDOSCOPIC SUBMUCOSAL DISSECTION FOR EARLY GASTRIC CANER
Gastrointestinal Endoscopy·2020
Su1336 EUS-GUIDED ANTEGRADE TREATMENT OF COMMON BILE DUCT STONES AFTER FAILED BALLOON ENTEROSCOPY-ASSISTED ERCP IN PATIENTS WITH SURGICALLY ALTERED ANATOMY
Gastrointestinal Endoscopy·2020Open Access
Guidelines for endoscopic diagnosis of early gastric cancer
Digestive Endoscopy·2020· 216 cited
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Frequent Co-authors

Masao Ichinose(35), Mitsuhiro Fujishiro(21), Mikitaka Iguchi(17), Hideyuki Tamai(17), Naohisa Yahagi(16), Kimihiko Yanaoka(16), Shotaro Enomoto(15), Masao Omata(14), Nobutake Yamamichi(12), Yasuhito Shimizu(12), Kazuki Ueda(12), Izumi Inoue(11), Shinya Kodashima(10), Takao Maekita(10), Naomi Kakushima(9), Hisanobu Deguchi(9), Satoshi Ono(8), Chizu Mukoubayashi(8), Kenji Arii(8), Takuhei Hashimoto(7)