"flat infiltrating ulcerative lesion with heaped-up margins."
"examination should be single-contrast or biphasic study (sign may be visible in double contrast study but may be not recognised)."
"compression must be applied to the stomach."
"Carman meniscus sign is seen after compression of a gastric tumour that surrounds the lesser curvature thus apposing both surfaces of the surrounding tumour and entrapping contrast between these margins causing a semilunar configuration 2,3."
"It is named after Russell Daniel Carman (1875-1926), a Canadian by birth, and a professor of roentgenology at the Mayo Clinic from 1913-1926 2,4. He was one of the pioneers of gastrointestinal radiology. The sign was described in the 1920s prior to double-contrast studies 3.He was past-President of both the American College of Radiology and Radiological Society of North America 4. He was also President-elect of the American Roentgen Ray Society at the time of his death. Ironically he was diagnosed with inoperable gastric carcinoma in 1925, leading to his premature death 5."
"The Carman meniscus sign describes the lenticular shape of barium in cases of large and flat gastric ulcers, in which the inner margin is convex toward the lumen. It usually indicates a malignant ulcerated neoplasm; in cases of benign gastric ulcers, the inner margin is usually concave toward the lumen 1."