What does this finding mean? abnormal circumferential thickening and edema seen of the distal gastric antrum at its junction with the duodenal bulb and involving the pylorus. a few tiny reactive mesenteric lymph nodes are seen in this area?

It isn't possible to know the meaning or importance of these results without knowing your symptoms and why your doctor ordered the test. It's often a mistake to concentrate on the details of an Xray, CT, MRI, etc, which are written for the physician and other health professionals, not the patient. Skip to the end of the report and look for "diagnosis", "interpretation", etc. Or ask your doctor.