What is Leiomyosarcoma?
A leiomyosarcoma belongs to a group of rare cancers called soft tissue sarcomas. Sarcomas are cancers that develop in the supporting or connective tissues of the body, such as muscle, fat, nerves, blood vessels, bone and cartilage. Leiomyosarcomas are one of the more common types of sarcoma to occur in adults. They start in smooth muscle tissue. These tissues are responsible for involuntary movements in the body and are found on the walls of muscular organs such as the heart, stomach and the walls of blood vessels. This means that leiomyosarcomas can start anywhere in the body. Common places are the walls of the womb (uterus), the limbs and the digestive system, particularly the stomach.