Right Intrathoracic Stomach Secondary to Congenital Hiatal Hernia with Organoaxial Torsion: A Report of Two Cases

Right intrathoracic stomach associated with organoaxial torsion is a rare form of congenital hiatal hernia. We report the radiologic findings in two cases of complete or partial right intrathoracic stomach secondary to congenital hiatal hernia. The barium meal test demonstrated the presence of complete or partial right intrathoracic stomach and non-obstructive organoaxial torsion with the greater curvature lying against the right chest wall. The esophagogastric junction was located above the diaphragm. CT revealed a cystic mass in the right posterior mediastinum. This cystic lesion should be differentiated from other congenital mediastinal cysts.

Radiologic Findings of Submucosal Tumors of Gastrointestinal Tract

Gastrointestinal submucosal tumors originate from submucosal histologic structures such as muscles, lymph nodes, nerves, fibers and vessels. Most patients are asymptomatic. Lesions that are large or ulcerated may cause abdominal pain or upper gastrointestinal bleeding, and those that grow intraluminally sometimes become pedunculated and occasionally prolapse to cause intussusception. Adenocarcinoma is the most common primary gastrointestinal tumor, accounting for approximately 90-9 5 % of such lesions, while submucosal tumors account for approximately 2 -6% of all gastrointestinal tumors. Because their overlying mucosa appears normal, submucosal tumors age after difficult to visualize endo-scopically, and for this reason, barium studies or CT scans are helpful for diagnosis. In this paper, variable CT and barium study findings of the different types of gastrointestinal submucosal tumor are demonstrated, and a brief discussion of the respective disease entities is included.

Partial Situs Inversus of the Gastrointestinal Tract Simulating Hepatic Abscess: Case Report

Partial situs inversus of the gastrointestinal tract is characterized by reversal of the positions of thestomach and intestine, but normal placement of thoracic viscera. Its incidence is lower than that of total situsinversus. We recently encountered a classic case of partial situs inversus which simulated clinically andradiographically a hepatic abscess in a 9-year-old girl. She visited the emergency room complaining ofright-upper-quadrant pain, with tenderness; the onset had been sudden. The posteroanterior chest and uprightabdomen showed an air-fluid level in the right subphrenic area, thus raising the possibility that an abscess waspresent. An upper gastrointesitinal series and barium follow-through study disclosed that the air-fluid level wasdue to the right gastric fun-dus and that the position of the intestines was totally reversed;the small bowel wasin the right abdomen and the ileocecal valve and colon in the left. We report this case because partial situsinversus rarely simulate clinically and radiographically a right subphrenic or hepatic abscess.