There are about 2656 clinical studies being (or have been) conducted in Puerto Rico. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
Phase II trial to study the effectiveness of radiation therapy following chemotherapy in treating children with CNS relapse from acute lymphoblastic leukemia. Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Combining chemotherapy with radiation therapy may kill more cancer cells.
Phase II trial to study the effectiveness of combination chemotherapy in treating patients with newly diagnosed metastatic Ewing's sarcoma or primitive neuroectodermal tumor. Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining more than one drug may kill more tumor cells.
RATIONALE: Video-assisted surgery followed by radiation therapy may be an effective treatment in patients whose poor heart and lung function make them high risk for standard surgery. PURPOSE: Phase II trial to study the effectiveness of video-assisted surgery followed by radiation therapy in treating patients with stage I non-small cell lung cancer and poor heart and lung function.
RATIONALE: Interferon alfa may interfere with the growth of cancer cells. PURPOSE: Phase II trial to study the effectiveness of interferon alfa in treating children with an HIV-related cancer including leukemia, non-Hodgkin's lymphoma, CNS lymphoma, or other solid tumors.
RATIONALE: Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Giving the drugs in different doses may kill more cancer cells. PURPOSE: Randomized phase III trial to compare the effectiveness of chemotherapy with various combinations of drugs in treating pediatric patients with advanced-stage large cell lymphoma.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high energy x-rays to damage tumor cells. It is not yet known whether combination chemotherapy alone or combination chemotherapy plus radiation therapy is more effective for childhood kidney cancer. PURPOSE: Phase III trial to compare the effectiveness of combination chemotherapy with or without radiation therapy in treating children who have kidney cancer.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Combining chemotherapy with peripheral stem cell transplantation may allow the doctor to give higher doses of chemotherapy drugs and kill more tumor cells. It is not yet known which therapy regimen is most effective for treating patients with kidney tumors. PURPOSE: Phase III trial to compare the effectiveness of chemotherapy with or without radiation therapy, surgery, and/or peripheral stem cell or bone marrow transplantation in treating young patients with kidney tumors.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. It is not known whether combining chemotherapy with bone marrow or peripheral stem cell transplantation is more effective than combination chemotherapy alone in treating men with germ cell tumors. PURPOSE: Randomized phase III trial to compare the effectiveness of combination chemotherapy with or without bone marrow or peripheral stem cell transplantation in treating men with previously untreated germ cell tumors.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so that they stop growing or die. bone marrow transplantation and peripheral stem cell transplantation may allow the doctor to give higher doses of chemotherapy drugs and kill more tumor cells. PURPOSE: Phase II trial to study the effectiveness of combination chemotherapy followed by bone marrow transplantation and/or peripheral stem cell transplantation in treating patients who have recurrent medulloblastoma or CNS germ cell tumors.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining more than one drug and giving drugs in different ways may kill more cancer cells. PURPOSE: Randomized phase III trial to compare the effectiveness of chemotherapy given in different ways in treating patients with surgically removed stage II or stage III colon cancer at high risk of recurrence.