Collecting and Storing Tissue, Blood, and Bone Marrow Samples From Patients With Rhabdomyosarcoma or Other Soft Tissue Sarcoma

The purpose of this study is to collect and store tumor tissue, blood, and bone marrow samples from patients with soft tissue sarcoma that will be tested in the laboratory. Collecting and storing samples of tumor tissue, blood, and bone marrow from patients to test in the laboratory may help the study of cancer.