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A 51-year-old woman presented to the emergency room with upper abdominal pain and elevated infection parameters. No abnormalities were found during gastroscopy. A CT scan demonstrated perigastricappendagitis. Perigastricappendagitis is a rare infarction of a fatty appendix of the perigastric ligaments. It is a benign and self-limiting disease.

Fatty falciform ligament appendage torsion (F-FLAT) is a rare type of intraperitoneal focal fat infarction that involves torsion of a fatty appendage of the falciform ligament. It may cause severe pain, mimicking an acute abdomen, but is typically self-limited and does not require hospitalisation or surgery. As a type of intraperitoneal focal fat infarction, it shares many of the same physiological, clinical and radiological features of epiploic appendagitis. To our knowledge, F-FLAT has not previously been reported in a patient following a laparoscopic Roux-en-Y gastric bypass surgery. Identifying falciform ligament appendagitis is critical because it can prevent unnecessary hospitalisation, follow-up studies and surgery., Competing Interests: Competing interests: None declared., (© BMJ Publishing Group Limited 2020. No commercial re-use. See rights and permissions. Published by BMJ.)

Torsion of the free end of the falciform ligament is an extremely rare cause of localized peritonitis. A surgically proven case is presented here, with ultrasound and CT findings and a review of the published work.

Introduction: Idiopathic segmental infarction of the peritonealized intra-abdominal fatty tissue is a rare cause of acute abdominal distress. Patients are operated for by suspected acute appendicitis or cholecystitis, and the true diagnosis is made intraoperatively., Methods: A 32-year-old woman was admitted to our hospital with a 2-day history of pain in the right upper abdomen. Clinical presentation suggested acute cholecystitis, but laboratory evaluation and sonography revealed no pathological findings. Because of a distinctly palpable and very painful epigastric tumor 2 x 3 x 3 cm, a CT scan was performed, that showed a clearly circumscribed mass in the ligamentum teres hepatis with hyperattenuating, infiltrating streaks. Laparoscopy was performed, and a tumor was found, that was adherent to the stomach's antrum and could easily be resected. Twenty-four hours after surgery the patient only felt slight discomfort and could be dismissed on the second day. Pathology report revealed a hemorrhagic infarction of the fatty tissue, which can be histologically found in idiopathic segmental necrosis of the greater omenum or the appendices epiploicae., Conclusions: Laparoscopy is an excellent diagnostic tool and also has therapeutic possibilities. Resection of the necrotic tissue ensures faster recovery and pain control and should be performed to prevent complications such as bacterial superinfection with formation of an abscess or spontaneous bleeding.

Abdominal pain radiating to the right upper quadrant, producing peritoneal signs, developed in a 30-year-old pregnant woman. At surgery, she was found to have an infarction of the falciform ligament that was excised.