Clinical trials are often used for people who are not responsive to conventional treatment or who wish to help researchers test new therapies. New therapies may include variations on chemotherapy drug combinations or the addition of immunotherapy for example.
Several types of therapy may be combined - for example immunotherapy is being studied in conjunction with traditional chemotherapy drugs to make them work better. Likewise, depending on disease presentation, radiotherapy may be added to chemotherapy.
Prior to treatment, the doctors may perform additional tests to measure such things as heart function (MUGA) and pulmonary (lung) function (Pulmonary Function Test). This sets a baseline to determine if lung or heart function is impacted by the treatment.
To learn more about pretreatment testing, see: