Russell body gastritis was first defined in 1998, but not many cases have been reported since then. The exact causes and process of this condition are unknown yet; however, considering the reported cases, it has been highly suggested to have correlation with Helicobacter pylori infection. Russell body gastritis has a non-specific clinical presentation of gastritis such as gastric mucosal edema in the macroscopic view. It can be mistaken as xanthoma, signet ring cell carcinoma, or a malignant lymphoma including mucosa-associated lymphoid tissue lymphoma and plasmocytoma. Russell body gastritis features polyclonal immunoglobulin and is differentiated from Mott cancer, of which immune globulin has monoclonal aspect. Authors report here two cases of Russell body gastritis with examined endoscopic findings as well as a review of related literature on the association of all reported cases of Russell body gastritis with H. pylori infection.

Fitz-Hugh-Curtis syndrome has been described as focal perihepatitis accompanying pelvic inflammatory disease caused by Neisseria gonorrhea and Chlamydia trachomatis. The highest incidence occurs in young, sexually active females. However, the syndrome has been reported to occur infrequently in males, according to the foreign literature. The predominant symptoms are right upper quadrant pain and tenderness, and pleuritic right sided chest pain. The clinical presentation is similar in men and women. In women, the spread of infection to liver capsule is thought to occur directly from infected fallopian tube via the right paracolic gutter. In men, hematogenous and lymphatic spread is thought to be postulated. Recently, we experienced a case of Fitz-Hugh-Curtis syndrome occurred in a man. As far as we know, it is the first report in Korea, and we report a case with a review of the literature.

The gastrointestinal tract is the most common site of extra-nodal non-Hodgkin lymphoma. However, the incidence of primary rectal lymphoma is extremely rare. Among the primary gastrointestinal lymphomas, follicular lymphoma has been described as a rare disease. It is difficult to diagnose rectal lymphoma due to its variable growth patterns and inadequate biopsies. Majority of patients with rectal lymphoma have non-specific symptoms or negative biopsies, often delaying the diagnosis. Our patient is a 62-year-old female. Two sessile and smooth subepithelial lesions with a yellowish normal mucosa were found on a screening colonoscopy. The initial mucosal biopsy finding was chronic inflammation, but we were highly suspicion of malignancy; we performed an endoscopic mucosal resection. Herein, we present a rare case of rectal follicular lymphoma diagnosed by endoscopic mucosal resection with a literature review.

Gastric ectopic pancreas is an uncommon developmental anomaly and its histological diagnosis is usually difficult by using a conventional biopsy forceps. In the literature, most cases of gastric ectopic pancreas were usually diagnosed by gross pattern during endoscopic examination or features of endoscopic ultrasound. In contrast, this disease was seldom diagnosed by histology in clinical practice. Although the typical endoscopic ultrasonographic features of ectopic pancreas include heterogeneous echogenicity, indistinct borders, and a location within 2 or more layers, it can also exhibit hypoechoic homogeneous echogenicity and a distinct border within the fourth sonographic layer (muscularis propria) similar to the endoscopic ultrasonographic features of gastrointestinal stromal tumors. In our study, we found that 53% of gastric ectopic pancreas originated within the fourth sonographic layer, demonstrating hypoechoic, homogeneous echogenicity, and distinct borders. Therefore, recognizing endoscopic ultrasonographic features, combining with deep biopsy, endoscopic ultrasound-guided fine needle aspiration/core needle biopsy can prevent conducting unnecessary resection. Surgical resection is the mainstay treatment for symptomatic gastric ectopic pancreas, but endoscopic resection using endoscopic mucosal resection or endoscopic submucosal dissection technique provides an alternative method of removing superficial-type and deep-type gastric ectopic pancreas.

Background/Aims: Differentiation of an extraluminal compression from a true subepithelial tumor (SET) in the esophagus by using endoscopy alone is often difficult. EUS is known as the best method for differentiating an extraluminal compression from a true SET. Extraluminal compression in the esophagus is occasionally observed, but its clinical significance has been rarely reported. Therefore, we aimed to evaluate the clinical significance of extraluminal compression in the esophagus according to the location of the lesion. Materials and Methods: Sixty-one patients were diagnosed as having an extraluminal compression in the esophagus by using EUS between January 2006 and March 2014. Some patients underwent chest computed tomography for accurate diagnosis. Results: The extraluminal compression was located at the mid-esophagus in 26 cases, lower esophagus in 22 cases, and upper esophagus in 13 cases. Of the 61 cases, 55 were caused by normal structures and 6 were caused by pathological lesions. The causes of the normal structures were the aorta, vertebra, trachea, left main bronchus, azygos vein, and diaphragm. The causes of the pathological lesions were engorged vessels and calcified lymph nodes. The posterior wall was the most frequent location of the extraluminal compression. However, the lesions in the anterior and right walls showed a higher frequency of pathological lesions than those in other sites. Conclusions: If the extraluminal compression is found in the anterior and right walls of the esophagus, more careful evaluation