There are about 3194 clinical studies being (or have been) conducted in Portugal. 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.
RATIONALE: It is not yet known if treatment for recurrent ovarian epithelial, fallopian tube, or primary peritoneal cancer is more effective if it is begun when blood levels of CA 125 become elevated rather than waiting for other indicators of disease recurrence. PURPOSE: This randomized phase III trial is studying early chemotherapy based on blood levels of CA 125 alone to see how well it works compared to chemotherapy based on conventional clinical indicators in patients with recurrent ovarian epithelial, fallopian tube, or primary peritoneal cancer.
RATIONALE: Radiation therapy may kill any tumor cells remaining after surgery. PURPOSE: This randomized phase III trial is studying radiation therapy to see how well it works compared to no further therapy in treating women with stage I, stage II, or stage III breast cancer that has been surgically removed.
RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells, and may be an effective treatment for anaplastic oligodendroglioma. Combining combination chemotherapy with radiation therapy may kill more tumor cells. PURPOSE: Randomized phase III trial to compare radiation therapy with and without combination chemotherapy in patients with resected anaplastic oligodendroglioma.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. It is not yet known if combination chemotherapy given after surgery is more effective than surgery alone for non-small cell lung cancer. PURPOSE: Randomized phase III trial to compare the effectiveness of combination chemotherapy following surgery with that of surgery alone in treating patients who have stage I, stage II, or stage IIIA non-small cell lung cancer.
RATIONALE: Interferon alfa may interfere with the growth of cancer cells. It is not known whether giving high-dose or low-dose interferon alfa is more effective than no further therapy in treating patients with stage III melanoma. PURPOSE: Randomized phase III trial to compare the effectiveness of high- or low-dose interferon alfa with that of no further therapy following surgery in treating patients who have stage III melanoma.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining chemotherapy with radiation therapy may kill more tumor cells. Bone marrow transplantation can replace immune cells that were destroyed by chemotherapy. PURPOSE: Randomized phase III trial to study the effectiveness of chemotherapy compared with or without bone marrow transplantation in treating patients with acute lymphoblastic leukemia.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Interferon alfa may interfere with the growth of the cancer cells. Interleukin-2 may stimulate a person's white blood cells to kill melanoma cells. It is not yet known which treatment regimen is more effective in treating melanoma. PURPOSE: Randomized phase II trial to compare the effectiveness of two regimens of combination chemotherapy plus interferon alfa and interleukin-2 in treating patients who have metastatic melanoma.
RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. It is not yet known whether giving chemotherapy after surgery is more effective than surgery alone in treating soft tissue sarcoma. PURPOSE: Randomized phase III trial to compare the effectiveness of surgery with or without chemotherapy in treating patients who have soft tissue sarcoma.
RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells and may be an effective treatment for patients with anaplastic astrocytomas. PURPOSE: Randomized phase III trial to study the effectiveness of radiation therapy in treating patients with anaplastic astrocytomas.
RATIONALE: Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Combining chemotherapy with peripheral stem cell or bone marrow transplantation may allow the doctor to give higher doses of chemotherapy drugs and kill more cancer cells. PURPOSE: Randomized phase III trial to compare the effectiveness of combination chemotherapy followed by bone marrow or peripheral stem cell transplantation in treating patients with acute myelogenous leukemia.