Safety and Efficacy of Self-Expandable Metallic Stent Placement Using Low Radial Force Stent for Malignant Dysphagia after Radiotherapy.

Introduction: We aimed to investigate the safety and efficacy of self-expandable metallic stent (SEMS) placement in patients with prior radiotherapy (RT) using the Niti-S stent, which is characterized by low radial force, in comparison to patients without prior RT.

Methods: A consecutive series of 83 patients who were treated by SEMS placement using Niti-S stent for severe malignant esophageal obstruction or fistula were enrolled. The adverse event rates and efficacy were retrospectively compared between patients with/without prior RT before SEMS placement (RT group [n = 32] versus non-RT group [n = 51]).

Ability of artificial intelligence to detect T1 esophageal squamous cell carcinoma from endoscopic videos and the effects of real-time assistance.

Diagnosis using artificial intelligence (AI) with deep learning could be useful in endoscopic examinations. We investigated the ability of AI to detect superficial esophageal squamous cell carcinoma (ESCC) from esophagogastroduodenoscopy (EGD) videos. We retrospectively collected 8428 EGD images of esophageal cancer to develop a convolutional neural network through deep learning.

Therapeutic outcomes of endoscopic resection for superficial non-ampullary duodenal tumor.

Background And Aim: Endoscopic resection (ER) is widely used as a minimally invasive therapy to remove superficial non-ampullary duodenal tumor (SNADT). However, the indication criteria have not yet been clearly determined. At our institute, ER is done only for SNADT measuring ≤ 20 mm.

Extensive 0-IIc (undifferentiated carcinoma) lesion around a gastric adenoma: a case report.

A 73-year-old woman underwent esophagogastroduodenoscopy (EGD) at a local hospital, which revealed a flat elevated lesion, approximately 15 mm in diameter, in the posterior wall of the lower gastric body. At our hospital, a repeat EGD and biopsy led to a diagnosis of moderately dysplastic adenoma. The patient requested endoscopic submucosal dissection (ESD).

Long-term release of a malignant ileal obstruction by placement of a colorectal self-expandable metal stent.

An 84-year-old man underwent the Hartmann procedure with an R1 resection for advanced rectal cancer. One year after surgery, the patient presented with abdominal pain and vomiting. Abdominal radiography and computed tomography revealed an expanding small bowel and ileal obstruction caused by invasion of local, recurrent rectal cancer.

Usefulness of sodium hyaluronate solution in colorectal endoscopic mucosal resection.

Background: In endoscopic mucosal resection (EMR), it is essential to inject submucosal fluid to prevent complications and ensure safe and complete en bloc resection of tumors. Sodium hyaluronate (SH) solution, which is effective in forming and maintaining a mucosal lift and is innocuous to mucosal tissue, is considered a useful injection solution for endoscopic submucosal dissection, a procedure associated with a high risk of perforation. This study was undertaken to assess the usefulness of this solution in EMR.

Safety, efficacy, and long-term outcomes for endoscopic submucosal dissection of early esophagogastric junction cancer.

Background: Early esophagogastric junction (EGJ) cancer is currently being treated in the same way as early gastric cancer, by endoscopic submucosal dissection (ESD), but long-term outcomes are still unknown. Our aim was to retrospectively evaluate the safety and efficacy of ESD in treating early EGJ cancer and compare risk factors in curative and non-curative resection cases.

Methods: Forty-four cases of early EGJ cancer, defined as a Siewert's type II tumor, in 44 patients with a mean age of 70.