Kenjiro Yamamoto

Analysis of crack patterns in concrete hollow block masonry retrofitted with fiber-reinforced paint using digital image correlation (DIC)

Zamzam Multazam, Kenjiro Yamamoto, Md. Shakhawat Hossain, Rajasekharan Shanthanu et autres

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Efficacy of Endoscopic Ultrasound‐guided Fine Needle Biopsy With Simplified Macroscopic On‐site Evaluation (With Video)

Kento Shionoya, Ryosuke Tonozuka, Shuntaro Mukai, Yuki Joyama et autres

ABSTRACT Background and Aims With advances in preoperative chemotherapy and comprehensive genomic profiling, endoscopic ultrasound‐guided fine needle biopsy (EUS‐FNB) has become vital for diagnosing pancreatic and peridigestive tract lesions. However, evidence remains limited regarding the performance of new‐generation puncture needles and simplified …

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Marked Response to Nivolumab Plus Ipilimumab After the Failure of Two Prior Immune Checkpoint Inhibitor–Based Regimens Including CTLA-4 Blockade in Advanced Hepatocellular Carcinoma

Shinichiro Minami, Wataru Sato, Kenjiro Yamamoto, Mitsuru Chiba et autres

Immune checkpoint inhibitor (ICI)-based combination therapies are standard treatments for advanced hepatocellular carcinoma (HCC). However, the efficacy of sequential ICI regimens remains unclear. We report the case of a 59-year-old woman with advanced HCC with peritoneal dissemination who showed rapid tumor regression …

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Efficacy of splinting tube-assisted duodenoscope insertion in patients with an inaccessible major papilla: a single-center retrospective study (with video)

Kento Shionoya, Kenjiro Yamamoto, Kyoko Asano, Takayoshi Tsuchiya et autres

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Clinical outcomes of endoscopic papillectomy for ampullary adenoma and adenocarcinoma: a multicenter retrospective study in Japan

Eisuke Iwasaki, Hiroki Kawashima, Yoshihisa Takada, Kazuo Hara et autres

BACKGROUND AND AIMS: Endoscopic papillectomy (EP) is a minimally invasive treatment for ampullary epithelial tumors. However, clinical outcomes and predictors of recurrence remain unclear. METHODS: We conducted a multicenter, retrospective cohort study at 22 tertiary centers in Japan, including patients who underwent …

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Endoluminal radiofrequency ablation for ingrowth occlusion after endoscopic ultrasound-guided hepaticogastrostomy with bridging stent placement

Kenjiro Yamamoto, Takayoshi Tsuchiya, Ryosuke Tonozuka, Shuntaro Mukai et autres

Endoscopic ultrasound-guided hepaticogastrostomy with bridging stent placement is a useful drainage option when endoscopic retrograde cholangiopancreatography fails for reasons such as inaccessible papillae or surgical anastomosis, particularly in patients with malignant hilar biliary obstruction who require bilateral drainage [ 1 ] [ …

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Recanalization Using a Temperature‐Controlled RF Catheter for Ingrowth Stent Occlusion in a Patient With Hilar Malignant Biliary Obstruction

Kenjiro Yamamoto, Hiroyuki Kojima, Takao Itoi

Watch a video of this article.

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MULTICENTER STUDY ON THE EFFICACY OF COMPUTER-AIDED DIAGNOSIS IN ENDOSCOPIC ULTRASONOGRAPHY FOR PANCREATIC DISEASES

Ryosuke Tonozuka, Tomohisa Iwai, Haruka Toyonaga, Nobuhiko Hayashi et autres

The impact of the novel EUS scope and ultrasonographic system for diagnosis and therapy in patients with pancreatobiliary diseases (videos)

Hiroyuki Kojima, Takao Itoi, Atsushi Sofuni, Takayoshi Tsuchiya et autres

PURPOSE: We evaluated the diagnostic and therapeutic capabilities of endoscopic ultrasonography (EUS) in pancreaticobiliary diseases. We aimed to validate the efficiency of detective flow imaging (DFI), shear wave elastography (SWE), and other advanced imaging techniques. METHODS: We used new EUS scopes (EG-740 …

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Evaluating the Usefulness of the Blood Apolipoprotein A2 Isoform Index for Pancreatic Cancer Diagnosis

Kento Shionoya, Atsushi Sofuni, Shuntaro Mukai, Takayoshi Tsuchiya et autres

Background: Early detection of pancreatic cancer using existing tumor markers is challenging, and novel biomarkers are needed. Apolipoprotein A2 (APOA2), which is not directly produced by tumors, may help detect pancreatic cancer through mechanisms distinct from carbohydrate antigen 19-9 (CA 19-9). This …

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A useful technique using a traction device and a rotatable sphincterotome for difficult biliary cannulation of an intradiverticular papilla

Kyoko Asano, Shuntaro Mukai, Takao Itoi, Takayoshi Tsuchiya et autres

An intradiverticular papilla can make biliary cannulation challenging during endoscopic retrograde cholangiopancreatography (ERCP). Some techniques to overcome this issue have been reported, such as the two-devices-in-one-channel method,1 pancreatic guidewire technique,2 precutting technique,3 and rendezvous technique.4 The recently developed traction device5 and rotatable …

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Enhancing seismic resilience in weak masonry units: the impact of rebar reinforcement in concrete hollow block masonry structures

Zamzam Multazam, Kenjiro Yamamoto, Kishor Timsina, Rajasekharan Shanthanu et autres

Abstract The use of low-compressive-strength concrete hollow blocks (CHB) as construction material in developing countries presents significant challenges to earthquake resilience. Weak CHBs are inherently vulnerable to earthquakes, not just at the structural level (in-plane, out-of-plane wall collapses, and roof failures), but …

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