Sarcoma

Sarcoma is a broad group of cancers that start in bone or soft tissues. They are uncommon and make up about 15,000 cases in the United States each year.

There are two primary types of sarcoma:

1. Soft tissue sarcoma

Soft tissue sarcoma starts in the soft tissues of the body, such as fat, nerves, muscles, tendons, tissues around the joint space, or blood vessels. These types of sarcomas can form anywhere in the body, but are most common in the arms, legs, and abdomen.

Most soft tissue sarcomas appear as a painless lump under the skin, often in the tissues of an arm or leg. Sarcomas may also appear in the abdomen and may not cause symptoms until they become very large. As the sarcoma grows, it can press on nearby organs, nerves, muscles, or blood vessels, causing pain or discomfort. You may also experience symptoms, such as trouble breathing.

2. Osteosarcoma

Osteosarcoma is a cancer of the bone that usually affects the bones of the arms or legs, near the knee or shoulder. This rare form of cancer is commonly diagnosed in children, teens, and young adults.