Nagarajan R, Neglia JP, Clohisy DR, Robison LL Limb salvage and amputation in survivors of pediatric lower-extremity bone tumors: what are the long-term implications? J Clin Oncol. 2002 Nov 15;20(22):4493-501. Review.
Pieper S, Ranft A, Braun-Munzinger G, Jurgens H, Paulussen M, Dirksen U Ewing's tumors over the age of 40: a retrospective analysis of 47 patients treated according to the International Clinical Trials EICESS 92 and EURO-E.W.I.N.G. 99. Onkologie. 2008 Dec;31(12):657-63. doi: 10.1159/000165361. Epub 2008 Nov 20.
Rosenbaum D, Brandes M, Hardes J, Gosheger G, Rödl R Physical activity levels after limb salvage surgery are not related to clinical scores-objective activity assessment in 22 patients after malignant bone tumor treatment with modular prostheses. J Surg Oncol. 2008 Aug 1;98(2):97-100. doi: 10.1002/jso.21091.
Song KM, Bjornson KF, Cappello T, Coleman K Use of the StepWatch activity monitor for characterization of normal activity levels of children. J Pediatr Orthop. 2006 Mar-Apr;26(2):245-9.
Weddington WW Psychological outcomes in survivors of extremity sarcomas following amputation or limb-sparing surgery. Cancer Treat Res. 1991;56:53-60. Review.
Functional and Clinical Long-Term Outcome of Ewing Sarcoma Treatment
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
