Paclitaxel and Carboplatin or Ifosfamide in Treating Patients With Newly Diagnosed, Persistent or Recurrent Uterine, Ovarian, Fallopian Tube, or Peritoneal Cavity Cancer

Inclusion Criteria: * Patients must have newly diagnosed stage I-IV, persistent or recurrent (including unstaged) uterine carcinosarcoma (malignant mixed mullerian tumor-MMMT or with ovarian, fallopian tube or peritoneal carcinosarcoma and an enrollment date prior to 10/21/2013; pathology confirmed by site/institutional pathologist prior to enrollment) and be chemotherapy naïve as directed against their carcinosarcoma; unstaged patients (patients who have not had hysterectomy or ovarian surgery) are eligible and should be included as "unstaged" if the only histologic (pathology) documentation of the disease is a biopsy or curettage of the uterus; if these patients have documented metastatic disease, it should be assigned the appropriate stage (III/IV) * Patients may have received prior adjuvant external beam radiation therapy and/or vaginal brachytherapy; patients should be at least 4 weeks from the completion of external beam radiotherapy prior to beginning protocol chemotherapy; patients do not need to be delayed if receiving vaginal brachytherapy only * Gynecologic Oncology Group (GOG) performance status 0, 1, or 2 * Patients must have recovered from the effects of recent surgery, radiotherapy, or other therapy * Patients must be free of active infection requiring antibiotics * Any hormonal therapy directed at the malignant tumor must be discontinued at least one week prior to beginning protocol chemotherapy; continuation of hormone replacement therapy is permitted * Plat…