You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A posteriorly perforating ulcer in the pyloric antrum of stomach is most likely to produce initial localized peritonitis or abscess formation in which of the following location? and explain in detail?
Ulcer in the pyloric antrum of stomach which perforate posteriorly produce peritonitis in the omental bursa (lesser sac). It is difficult to diagnose when perforation occur to lesser sac and patient may not have obvious signs of peritonitis. Ref: Bailey and Love's Sho Practice of Surgery, 23rd Edition, Page 1045.