These are usually situated in the epigastric or umbilical region, and are often of considerable size. In shape they are globular, elongated, or irregular, and the surface is frequently nodular from implication of the omentum. In most cases they descend upon inspiration ; but lateral mobility seldom exists to any great extent, since it is usually abolished at an early period by the formation of adhesions. Growths of the anterior surface and of the greater curvature are always distinct, and often exhibit a rapid increase of size, while those of the lesser curvature may be detected only on deep inspiration. All varieties afford a dull note on light percussion and a tympanitic sound with a forcible stroke of the finger. Inflation of the stomach obscures a tumour of the upper margin, but renders those of the great curvature more distinct. Distension of the colon displaces them all upwards. A growth of the posterior wall of the stomach seldom forms a palpable tumour.