Grades K â 12 | Student Interactive | Organizing & Summarizing. Story Map. The Story Map interactive is designed to assist students in prewriting and postreading activities by focusing on the key elements of character, setting, conflict, and resolution.
With hemangiosarcoma, the pericardium fills up with blood due to rupture of the tumor. When the tumor occurs in the skin, a mass or lump can usually be felt in or under the skin. The mass may become ulcerated and bleed. When the tumor occurs in a bone, it can cause pain and discomfort.
In most cases, it's not clear what causes soft tissue sarcoma. In general, cancer occurs when cells develop errors (mutations) in their DNA. The errors make cells grow and divide out of control. The accumulating abnormal cells form a tumor that can grow to invade nearby structures and spread to other parts of the body. The type of cell that develops the genetic mutation determines what type of soft tissue sarcoma you have. Some types of soft tissue sarcoma include: Alveolar soft part sarcoma. Angiosarcoma. Clear cell sarcoma. Dermatofibrosarcoma protuberans.