posterior wall perforating ulcer

Ulcer penetration refers to an ulcer that extends deeply to the serosal layer, causing local inflammation and adhesions due to obstruction by adjacent tissues, or the ulcer penetrating into adjacent tissues to form a walled-off perforation. This is most commonly seen in posterior wall duodenal ulcers; penetration is rare in gastric ulcers. More than half of these penetrate into the pancreas, followed by the hepatogastric ligament. Duodenal ulcers may also penetrate into the gallbladder or common bile duct, while gastric ulcers may penetrate into the transverse colon.