BACKGROUND We developed a novel artificial simulator for endoscopic submucosal dissection (ESD) as a bridge between instructional videos and animal tissue training and aimed to evaluate the feasibility of using an artificial tissue model in ESD training. METHODS Eight gastroenterology fellows from one medical center were enrolled in this ESD training program. Before and after the simulator tr...

Early esophageal cancer is defined as a tumor invading the mucosa with or without lymph node or distant organ metastasis. In the current guidelines for early esophageal cancer, absolute indication for endoscopic resection include lesions limited to the epithelium or lamina propria mucosa not exceeding two-thirds of the circumference, and relative indications include lesions limited to the muscu...

A 23-year-old man was admitted to our hospital with the complaint of chest discomfort and dyspnea for the previous 3 months. Upper endoscopy showed a 2.5×2.0cm bulging lesion in the distal esophagus (●" Fig.1). Endoscopic ultrasound revealed a 1.1×2.5cm hypoechoic cystic lesion arising from the muscularis propria (●" Fig.2). Endoscopic submucosal tunnel dissection (ESTD) was performed using a h...

Background and study aims A 54-year-old man was diagnosed with a rectal tumor extending through the submucosal layer. The patient refused surgery and therefore endoscopic submucosal dissection (ESD) was pursued. The lesion exhibited the muscle retraction sign. After dissecting circumferentially around the fibrotic area by double tunneling method, a myotomy was performed through the internal cir...

Background and study aims: Gastric neuroendocrine tumors (NETs) are rare lesions that develop from neuroendocrine cells. NETs are classified into 3 types based on the rate of mitosis and Ki-67 labeling index; the NET G1 type is synonymously referred to as carcinoid. Gastric NETs are usually discovered as submucosal tumors during upper gastrointestinal endoscopic examination. This study reports ...

Endoscopic submucosal dissection (ESD) for the treatment of esophageal mucosal lesions is associated with a risk of esophageal stenosis, especially for near-circumferential or circumferential esophageal mucosal defects. Here, we review historic and modern studies on the prevention and treatment of esophageal stenosis after ESD. These methods include prevention via pharmacological treatment, end...

Endoscopic mucosal resection and endoscopic submucosal dissection are used for the treatment of early gastrointestinal tract cancers. Bleeding is one most common complications encountered when performing these procedures. It more in gastric cases than esophageal colorectal cases. important to take measures before, during after procedure mitigate risk bleeding. Patient history should be carefull...

Endoscopic submucosal dissection (ESD) has recently been accepted as a standard treatment for patients with early gastric cancer (EGC), without lymph node metastases. Given the rise in the number of ESDs being performed, new endoscopic accessories are being developed and existing accessories modified to facilitate the execution of ESD and reduce complication rates. This paper examines the histo...