The lipoma is a benign tumor of fat. Although it represents by far the most common mesenchymal neo-plasm, most examples occur on the trunk and proximal portions of the extremities. Oral lipomas are usually soft, smooth-surfaced nodular masses that can be sessile or pedunculated.Typically, the tumor is asymptomatic and often has been noted for many months or years before diagnosis. Most are less than 3 cm in size, but occasional lesions can become much larger The picture shows soft, yellow nodular mass in the floor of the mouth.