Aiji Hattori

Inverted Meckel’s diverticulum in adults: two case reports and a systematic review

Yasuhiko Hamada, Yohei Ikenoyama, Aiji Hattori, Noriyuki Horiki et autres

Inverted Meckel’s diverticulum (IMD) is a rare condition that may present as adult intussusception or as an intraluminal small-bowel lesion. Because its clinical and radiological features are nonspecific, IMD is frequently misdiagnosed preoperatively as a small-bowel tumor or another lead-point lesion. This …

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An unusual gastric mass in a patient with human immunodeficiency virus infection

Aiji Hattori, Yasuhiko Hamada, Hayato Nakagawa

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Improved hypopharyngeal visibility and early cancer detection using the modified Killian method during esophagogastroduodenoscopy in patients at high risk of head and neck cancer

Yuki Yoshida, Yohei Ikenoyama, Toru Ogura, Hiroto Suzuki et autres

BACKGROUND: Patients with a history of esophageal squamous cell carcinoma or pharyngeal cancer are at high risk of laryngopharyngeal cancers, particularly in the hypopharynx. However, adequate hypopharyngeal visualization during esophagogastroduodenoscopy is challenging because of anatomical constraints. We evaluated the utility of the …

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Efficacy and safety of photodynamic therapy using an ultra-thin endoscope for local failure with esophageal stenosis after chemoradiotherapy for esophageal cancer

Aiji Hattori, Tomohiro Kadota, Hiroki Yamashita, Nobuhisa Minakata et autres

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Endoscopic submucosal dissection with multipoint traction: radial crane method

Saki Aota, Aiji Hattori, Yohei Ikenoyama, Noriyuki Horiki et autres

Clinical characteristics of synchronous and metachronous superficial esophageal squamous cell carcinoma during surveillance after endoscopic submucosal dissection

Marina Kuroda, Yohei Ikenoyama, Hiroto Suzuki, Aiji Hattori et autres

BACKGROUND: Although endoscopic submucosal dissection (ESD) is the standard treatment for superficial esophageal squamous cell carcinoma (SESCC), the clinical characteristics of synchronous and metachronous (secondary) lesions detected during follow-up remain unclear. This study aimed to compare the clinicopathologic characteristics and outcomes of …

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Hybrid-argon plasma coagulation for superficial esophageal cancer at risk of airway obstruction: a case report

Junki Toyoda, Aiji Hattori, Yohei Ikenoyama, Misaki Nakamura et autres

Endoscopic submucosal dissection (ESD) is the standard treatment for superficial esophageal squamous cell carcinoma (ESCC). However, this procedure is associated with complications and a relatively long procedure time [ 1 ]. Argon plasma coagulation (APC) is a technically simple treatment for ESCC, …

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Propensity Score-matched Analysis of the Impact of Direct-acting Oral Anticoagulants on Fecal Immunochemical Test Performance

Yasuhiko Hamada, Akina Shigefuku, Hiroto Suzuki, Aiji Hattori et autres

Objectives: The fecal immunochemical test (FIT) is widely used for colorectal cancer (CRC) screening, owing to its high diagnostic accuracy. Antithrombotic medications, particularly direct-acting oral anticoagulants (DOACs), can influence FIT performance; however, the evidence concerning this phenomenon remains inconsistent in the literature. …

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Evaluation of Physiological Workload among Endoscopy Staff

Emi YUDA, Aiji Hattori, Reiko Yamada, Tetsuro Miwata et autres

Background: Assessing the physiological workload of medical staff in endoscopy units is crucial for optimizing occupational health. This study evaluates the relationship between body surface temperature, heart rate (HR), and physical activity (steps) among endoscopy staff using both linear and non-linear correlation …

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Objective Assessment of Visibility of Colorectal Lesions Using Eye Tracking for New Image‐Enhanced Endoscopy Observation

Aiji Hattori, Hiroaki Ikematsu, Hiroki Yamashita, Takuma Oguro et autres

BACKGROUND AND AIM: This study aimed to objectively evaluate colorectal lesion visibility using white-light imaging (WLI), narrow-band imaging (NBI), and texture and color enhancement imaging (TXI) with an eye tracking system. METHODS: Twelve endoscopists assessed 120 images of 30 colorectal lesions (29 …

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Magnifying Endoscopic Classification for Early Barrett’s Neoplasia

Yohei Ikenoyama, Aiji Hattori, Yasuko Fujiwara, Misaki Nakamura et autres

BACKGROUND: Barrett's esophagus (BE) is becoming increasingly prevalent in both Western countries and Japan. Early diagnosis of Barrett's neoplasia remains challenging. Traditionally, the Seattle protocol, a four-quadrant random biopsy method, has been recommended in Western guidelines. However, this approach has several limitations, …

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Hybrid argon plasma coagulation for chronic radiation-induced proctitis following pelvic chemoradiotherapy for cervical adenocarcinoma: a case report

Aiji Hattori, Yohei Ikenoyama, Yasuko Fujiwara, Misaki Nakamura et autres

Chronic radiation-induced proctitis is a common complication of pelvic radiotherapy that frequently presents with rectal bleeding and mucosal friability. Argon plasma coagulation (APC) is considered the first-line treatment for this condition [ 1 ]; however, it is associated with complications, such as …

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