Surgery Plus Chemotherapy (Doxorubicin, Vincristine and Etoposide), Mitotane, and Tariquidar to Treat Adrenocortical Cancer

This study will examine the safety and effectiveness of treating adrenocortical cancer with combination chemotherapy using doxorubicin, vincristine, and etoposide in addition to the drugs mitotane and tariquidar and, when possible, surgery. Adrenocortical cancer cells have a large amount of a protein called P-glycoprotein that "pumps" anti-cancer drugs out of the cells, decreasing their effectiveness. Continuous infusions of doxorubicin, vincristine, and etoposide may improve chemotherapy results by blocking the P-glycoprotein pump, as may use of tariquidar, an experimental drug that is known to block the P-glycoprotein pump. Patients 18 years of age and older with adrenocortical cancer that has recurred, spread, or cannot be treated surgically may be eligible for this study. Candidates will be screened with a medical history and physical examination; review of pathology slides; blood tests; electrocardiogram (EKG); imaging tests, including computed tomography (CT) of the chest, abdomen and pelvis; chest x-ray; and possibly a bone scan or other imaging tests needed to evaluate the cancer, urine studies, and an echocardiogram. Also, a biopsy (removal of a small sample of tumor tissue) may be required if a specimen is not available to confirm the cancer. Participants will undergo the following tests and procedures: * Tumor biopsy. Before starting chemotherapy, a small piece of tumor is removed to study the P-glycoprotein pump and to determine the tumor genetics. * Blood draw. Blood is drawn before treatment begins to establish baseline levels for future blood tests. * Central venous catheter placement. A specially trained physician places a plastic tube into a major vein in the chest. The tube is used to give the study drugs and other medications and to withdraw blood samples. It can stay in the body for months or be removed after each treatment is completed. The tube placement is done under a local anesthetic in the radiology department or operating room. * Chemot