Kazuki Hirano

Mechanism of Fibrotic Anastomosis Formation in Endoscopic Ultrasound‐guided Hepaticogastrostomy Using a Plastic Stent: Insights From an Autopsy Case of Perihilar Cholangiocarcinoma

Kosuke Maehara, Junji Mitsushita, Tomoyoshi Shida, Kazuki Hirano et autres

Endoscopic ultrasound-guided hepaticogastrostomy (EUS-HGS) is an established alternative to other biliary drainage techniques for treating malignant biliary obstruction. Although the anastomosis created by EUS-HGS is believed to mature within several weeks, histopathological evidence supporting this assumption remains limited, particularly in procedures using …

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Argon Plasma Coagulation for Intraductal Papillary Mucinous Carcinoma Using an Ultrathin Endoscope With a Transparent Hood

Kazuki Hirano, Kosuke Maehara, Tsunao Imamura

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A case of encapsulating peritoneal sclerosis associated with tuberculous peritonitis

Hiroshi Naito, Kosuke Maehara, Kazuki Hirano, Daisuke Hattori et autres

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Intraoperative collaboration between surgeons and endoscopists who performed previous endoscopic ultrasound in laparoscopic ultrasound-guided pancreatic tumor enucleation

Kosuke Maehara, Satoshi Okubo, Kazuki Hirano, Daisuke Hattori et autres

Recent advancements in imaging technology and endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) have led to increased detection of small pancreatic tumors, enhancing the opportunities for surgical resection. Laparoscopic pancreatic tumor enucleation is a suitable minimally invasive treatment, especially for tumors that usually have …

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Into the pancreas: an underwater world filled with an intraductal papillary mucinous neoplasm seen via peroral pancreatoscopy

Kazuki Hirano, Kosuke Maehara, Daisuke Hattori, Yoshiki Sato et autres

Although peroral pancreatoscopy (POPS) has been developed for detailed visualization of intraductal lesions, the images obtained are often inadequate because of the difficulty of insertion, the proximity of the pancreatoscope to the lesion, or visualization challenges due to mucus. Performance can be …

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Into the pancreas: an underwater world filled with an intraductal papillary mucinous neoplasm seen via peroral pancreatoscopy

Kazuki Hirano, Kosuke Maehara, Daisuke Hattori, Yoshiki Sato et autres

Although peroral pancreatoscopy (POPS) has been developed for detailed visualization of intraductal lesions, the images obtained are often inadequate because of the difficulty of insertion, the proximity of the pancreatoscope to the lesion, or visualization challenges due to mucus. Performance can be …

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A case of extraosseous Ewing sarcoma diagnosed by EUS-FNA for a pancreatic tail mass

Hiroshi Naito, Yoshiki Sato, Kazuki Hirano, Daisuke Hattori et autres

A woman in her 50s visited another hospital because of a left lower abdominal mass. CT showed masses in the pancreatic tail and lower left abdomen, and she was referred to our hospital. Contrast-enhanced CT showed masses in the pancreatic tail, left …

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Metastatic Gastric Tumors: Clinical and Endoscopic Features

Kazuki Hirano, Kosuke Nomura, Yorinari Ochiai, Junnosuke Hayasaka et autres

INTRODUCTION: Stomach metastasis is rare, and there are few reports on its endoscopic features. Herein, we focused on the endoscopic features and discussed and reviewed the clinicopathological characteristics of metastatic gastric tumors. METHODS: We conducted an analysis on the clinicopathological features of …

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Two Cases of Disseminated Alveolar Echinococcosis: The Diagnosis, Management, and Differential Considerations for Liver Lesions

Kazuki Hirano, Yuta Maruki, Daiki Yamashige, Osamu Kobayashi et autres

Alveolar echinococcosis (AE), caused by Echinococcus multilocularis, is an aggressive and potentially critical infestation that primarily affects the liver and can metastasize to any part of the body. We herein report two cases of echinococcosis, which could be differentiated from malignancy on …

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A novel endoscopic ultrasound guided re-pancreaticogastrostomy using forward-viewing echoendoscope

Kosuke Maehara, Tetsuo Tamura, Kazuki Hirano, Daisuke Hattori et autres

Recently, there has been a significant increase in the use of endoscopic ultrasound (EUS)-guided interventions, and several new EUS-guided drainage methods have been reported [ 1 ] [ 2 ] [ 3 ]. In the present case, we describe a novel technique …

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A case of Brunner's gland hyperplasia diagnosed by ultrasound endoscopy

Kazuki Hirano, Yoshiki Sato, Daisuke Hattori, Kosuke Maehara et autres

Duodenal Brunner's gland hyperplasia is a relatively common duodenal elevated lesion, but there is currently no unified opinion on its diagnosis. Although there is little doubt about the diagnosis when the lesion presents with a typical appearance, it is often difficult to …

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A rare case of Helicobacter pylori–uninfected foveolar-type gastric cancer with submucosal invasion and lymph node metastasis

Kazuki Hirano, Kosuke Nomura, Nobuhiro Dan, Masami Tanaka et autres

Gastric cancer without Helicobacter pylori infection accounts for less than 1% of all gastric cancers, and is generally considered to be less invasive. This report describes a rare case of H. pylori–uninfected gastric cancer with deep submucosal invasion and lymph node metastasis. …

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