An Analysis of Delayed Bleeding in Cases of Colorectal Endoscopic Submucosal Dissection Due to Types of Direct Oral Anticoagulants in Japan.

BACKGROUND & AIMS: Reported rates of delayed bleeding (DB) after endoscopic resection using direct oral anticoagulants (DOACs) are high and heterogeneous. This large-scale multicenter study analyzed cases of DB after colorectal endoscopic submucosal dissection related to various types of DOACs in Japan (the ABCD-J study) with those associated with warfarin. METHODS: We retrospectively reviewed 1019 lesions in patients treated with DOACs and 459 lesions in patients treated with warfarin among 34,455 endoscopic submucosal dissection cases from 47 Japanese institutions between 2012 and 2021. The DB rate (DBR) with each DOAC was compared with that with warfarin. Risk factors for DB in patients treated with DOACs or warfarin were also investigated. RESULTS: The mean tumor sizes in the DOAC and warfarin groups were 29.6 ± 14.0 and 30.3 ± 16.4 mm, respectively. In the DOAC group, the DBR with dabigatran (18.26%) was significantly higher than that with apixaban (10.08%, P = .029), edoxaban (7.73%, P = .001), and rivaroxaban (7.21%, P < .001). Only rivaroxaban showed a significantly lower DBR than warfarin (11.76%, P = .033). In the multivariate analysis, heparin bridging therapy (odds ratio [OR], 2.18; 95% confidence interval [CI], 1.27-3.73, P = .005), rectal location (2.01, 1.28-3.16, P = .002), and procedure time ≥55 minutes (2.43, 1.49-3.95, P < .001) were significant risk factors for DB in the DOAC group. The DB risk in the DOAC group (OR, (95% CI)) was 2.13 (1.30-3.50) and 4.53 (2.52-8.15) for 1 and 2 significant risk factors, respectively. CONCLUSIONS: Dabigatran was associated with a higher DBR than other DOACs, and only rivaroxaban was associated with a significantly lower DBR than warfarin.

Sudden detection of pyriform sinus carcinoma during endoscopic retrograde cholangiopancreatography.

Iatrogenic trauma and perforation are among the most concerning complications of endoscopic retrograde cholangiopancreatography (ERCP). A 76-year-old man presented for management of obstructive jaundice caused by pancreatic cancer. The ERCP was planned for further evaluation of pancreatic cancer and endoscopic biliary drainage. The ERCP scope could not pass because of resistance during the initial attempt to insert it through the pyriform sinus. After two attempts, mild bleeding occurred in the oral cavity, and the ERCP scope was successfully inserted in the esophagus. Tissue debris was observed in the esophagus; however, it was considered attributable to damage during insertion. Because passage was difficult, we placed a guidewire deep in the duodenum to ensure an accurate route and removed the ERCP scope. Then, we switched to direct-view esophagogastroduodenoscopy (EGD) and observed the pyriform sinus. EGD showed an irregular ridge and stenosis, which were determined to comprise a pyriform sinus tumor. Tissue fragments at the ERCP insertion site were retrieved for pathological examination. The ERCP scope was inserted using a guidewire, and biliary drainage was completed. When unexpected resistance is noticed, endoscopic manipulation should be stopped, and a detailed evaluation should be conducted. Endoscopists, particularly trainees with limited procedural experience, should be vigilant of these potential complications.

A case of a rare foreign object found in the stomach - A Hem-o-Lok clip after laparoscopic distal pancreatectomy.

We assessed an 81-year-old woman who underwent laparoscopic distal pancreatectomy for a large branched-type intraductal papillary mucinous neoplasm. An enlarged and infected 60-mm cyst was found adjacent to the resection margin one month after surgery. The non-absorbable polymer clip (NAPC: Hem-o-Lok), which was used for ligation of the splenic artery, could also be visualized. We performed endoscopic ultrasound guided-cyst drainage (EUS-CD) for controlling the enlarged and infected cyst. Further, we planned to remove the tube endoscopically after 6 months. During esophagogastroduodenoscopy six months later, the post-EUS-CD scar could be detected without the EUS-CD tube. However, a white artifact could be seen protruding from the outside of the gastric wall into the stomach. Despite the difference in color and morphology, we thought the EUS-CD tube might have been torn at first. We grasped the artifact with endoscopic forceps, and the object was identified as an NAPC. We considered that the fragility and inflammation of the pancreas and surrounding tissues led to the collection of necrotic pancreatic fluid, resulting in an inflammatory response. Upon tearing the puncture hole little by little following EUS-CD, the NAPC was dislodged as an unanticipated foreign body.

Swallowing a gummy without chewing presenting as a symptom of steakhouse syndrome.

A 30-year-old healthy woman suddenly developed uncontrollable chest oppression in the mid-chest; cardiovascular abnormalities were suspected. Esophageal food impaction, known as "steakhouse syndrome," is a condition in which food is consumed too fast and remains stuck in the esophagus. This disease can be confused with acute coronary syndrome because the patient may complain of pain behind the sternum.

Colonic perforation after esophagogastroduodenoscopy: complications with self-expanding metallic stents.

An 83-year-old man was admitted to the emergency room with abdominal pain and bloating. Abdominal computed tomography (CT) revealed a sigmoid colon obstruction caused by colonic carcinoma involving a short segment with circumferential luminal narrowing. The patient underwent endoscopy with colonic self-expanding metallic stent (SEMS) placement as a bridge to surgery. Six days after SEMS placement, the patient was prepared for esophagogastroduodenoscopy for screening. Although screening revealed no complications, 8 h later, the patient complained of sudden abdominal pain. Emergency abdominal CT revealed that the SEMS was about to burst out of the colon. An emergency operation with sigmoidectomy and colostomy was performed, and operative findings revealed a colonic perforation by the SEMS at the proximal side of the tumor. The patient was discharged from the hospital without major problems. This case is a very rare complication of colonic SEMS insertion. It is possible that increased intraluminal bowel movement and/or CO2 pressure during the esophagogastroduodenoscopy caused colonic perforation. Endoscopic placement of a SEMS is an effective alternative to surgical decompression for treating colon obstruction. To avoid unexpected and unnecessary perforations, tests that could increase the intraluminal pressure within the intestine after SEMS insertion should be avoided.

Hepatic invasion of a gastric ulcer confirmed by endoscopy and surgery.

A 66-year-old woman who had been suffering from chronic anorexia for two years was transported to the hospital after being unable to consume food for three days. She had no hematemesis or abdominal pain and had no history of taking nonsteroidal anti-inflammatory drugs. Blood tests showed marked anemia with hemoglobin of 3.3 g/dL, and esophagogastroduodenoscopy revealed a large ulcer lesion in the lesser curvature of the gastric body and a liver-like mass protruding from the ulcer base. Biopsy of the mass showed proliferation of cells showing irregular cord-like structures, suggestive of normal liver tissue or hepatocellular carcinoma. Computed tomography scan showed no obvious free air in the abdomen. Despite conservative treatment, the patient developed hematemesis and progressive anemia, and surgery was performed (total gastrectomy with partial hepatectomy). Surgical specimen showed an ulcer lesion with fibrosis and loss of wall structure in all layers of the stomach, and liver adhesion with fibrosis deep in the ulcer, but no malignant findings. With the advent of powerful gastric acid secretion inhibitors, gastric ulcer invasion into the liver is now very rare, and this case is thus a valuable example showing very clear images.