NCIt definition : A rare soft tissue neoplasm arising from the stomach. It occurs in the antrum and
pyloric region and it may extend into the duodenum. It occurs in all ages and affects
men and women equally. Morphologically it is characterized by a multinodular plexiform
mass that involves the muscular layer. The neoplastic cells are spindle-shaped and
the mitotic activity is low. It follows a benign clinical course.;