Gastric polypoid lesions detected on magnetic resonance cholangiopancreatography

Abstract Background: On magnetic resonance cholangiopancreatography (MRCP) using a negative oral contrast agent, the gastric lumen appear dark, and gastric polypoid lesions can be seen. To our knowledge, there are no reports examining gastric polypoid lesions detected on MRCP.We exained the characteristics of gastric polypoid lesions detected on MRCP and discussed the management of the lesions.Material and Methods: MRCP images using a negative oral contrast agent were retrospectively evaluated in 1128 cases, and gastric polypoid lesions detected were investigated.Results: Gastric polypoid lesions were detected in 17 of the 1128 cases (1.5%) on MRCP. The mean patient age and gender were 66.7 years (range: 48-85 years) and 7 males / 10 females. A single lesion was detected in 4 cases, 2 to 4 lesions were detected in 6 cases, 5 to 10 lesions in 3 cases, and 11 or more in 4 cases. In 4 cases, the upper, middle, and lower portions of the stomach were occupied with polypoid lesions, in 4 cases, the upper and middle portions were occupied, in 1 case, the middle and lower portions were occupied, and in 8 cases, only the upper portion was occupied. One lesion was detected in 4 cases, 2 to 4 lesions were detected in 6 cases, 5 to 10 lesions in 3 cases, and 11 or more in 4 cases. The mean maximum diameter of the polypoid lesions was 7.8 mm (range: 4-16 mm). An upper endoscopy and forceps biopsy were performed in 9 of the 17 cases. The histological diagnosis was fundic gland polyps in 6 cases and hyperplastic polyps in 3 cases.Conclusion: Gastric polypoid lesions can rarely be detected on MRCP. The polypoid lesions were histologically fundic gland polyps or hyperplastic polyps. In the future, we will prospectively review more cases and examine indication of upper gastrointestinal endoscopy to gastric polypoid lesions detected on MRCP.