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.
RATIONALE: Removing the sentinel lymph nodes and examining them under a microscope may help plan more effective surgery for breast cancer. It is not yet known if surgery to remove the sentinel lymph nodes is more effective with or without removal of the lymph nodes in the armpit in treating breast cancer. PURPOSE: Randomized phase III trial to compare the effectiveness of surgery to remove the sentinel lymph nodes with or without removal of lymph nodes in the armpit in treating women who have breast cancer.
RATIONALE: Chemotherapy drugs use different ways to stop tumor cells from dividing so they stop growing or die. Chemoprotective drugs such as amifostine may protect normal cells from the side effects of chemotherapy. PURPOSE: Phase I trial to study the effectiveness of high-dose cisplatin, etoposide, and bleomycin plus amifostine in treating children who have malignant germ cell tumors.
RATIONALE: Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Monoclonal antibodies can locate cancer cells and either kill them or deliver tumor-killing substances to them without harming normal cells. It is not yet known whether cisplatin plus monoclonal antibody therapy is more effective than cisplatin alone for metastatic or recurrent head and neck cancer. PURPOSE: Randomized double-blinded phase III trial to compare the effectiveness of cisplatin with or without monoclonal antibody in treating patients who have metastatic or recurrent head and neck cancer.
RATIONALE: Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. PURPOSE: Phase II trial to study the effectiveness of theophylline in treating patients who have in situ, stage I, or stage II chronic lymphocytic leukemia.
RATIONALE: Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Combining more than one drug and combining drugs in different ways may kill more cancer cells. PURPOSE: Phase II trial to study the effectiveness of chemotherapy in treating children who have very high risk acute lymphocytic leukemia.
RATIONALE: Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Combining more than one drug may kill more cancer cells. It is not yet known whether combining cyclophosphamide with fludarabine is more effective than fludarabine alone in treating chronic lymphocytic leukemia. PURPOSE: Randomized phase III trial to study the effectiveness of fludarabine with or without cyclophosphamide in treating patients who have chronic lymphocytic leukemia that has not been treated previously.
Phase II trial to study the effectiveness of topotecan in treating children who have recurrent, relapsed, or refractory sarcoma. Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die.
RATIONALE: Antibiotics may decrease the side effects of neutropenia and fever caused by chemotherapy. Colony-stimulating factors such as G-CSF may increase the number of immune cells found in bone marrow or peripheral blood and may help a person's immune system recover from the side effects of chemotherapy. It is not yet known whether antibiotic therapy plus G-CSF is more effective than antibiotic therapy alone for treating side effects caused by chemotherapy. PURPOSE: Randomized phase III trial to compare the effectiveness of antibiotic therapy with or without G-CSF in treating children who have neutropenia and fever that are caused by chemotherapy.
RATIONALE: Video-assisted surgery may be an effective treatment and have fewer side effects than conventional surgery in patients with non-small cell lung cancer. PURPOSE: Phase II trial to study the effectiveness of video-assisted surgery in treating patients who have non-small cell lung cancer.
RATIONALE: Drugs used in chemotherapy use different ways to stop cancer cells from dividing so they stop growing or die. Combining more than one drug may kill more cancer cells. PURPOSE: Phase II trial to study the effectiveness of combination chemotherapy in treating children who have newly diagnosed acute lymphocytic leukemia.