Keiichi Yamasaki

Pseudotumor of the omentum with a fishbone nucleus.

A 23‐year‐old Japanese man was admitted with a chief complaint of abdominal pain. He was previously healthy, and his past medical history was unremarkable. Local tenderness and rebound tenderness at McBurney’s point were elicited. Abdominal roentgenography was non‐diagnostic. Ultrasonography and computed tomography showed a tumor with a central core. Based on a diagnosis of appendicitis with omental inflammation or an omental tumor, laparotomy performed. Intraoperatively, no site of gastrointestinal perforation was detected; however, a 5‐cm omental granuloma was identified that proved to have a fishbone nucleus on pathological examination. The postoperative course was uneventful, and upper gastrointestinal endoscopy and barium enema were unremarkable. A large solitary omental pseudotumor is rare, and the clinical course in this case was atypical compared with the usual course of intestinal perforation by a foreign body and formation of an intra‐abdominal granuloma.

RETRACTED: Continuous treatment with organic nitrate affects hepatic cytochrome P450

Abstract This article has been retracted by the publisher since it has emerged that the article was published in a similar format elsewhere. The Editor and publisher acted in good faith on the basis of the information available to them and remain committed to the highest ethical and scientific standards in the peer review and publication of submissions.