<prompt> EMA-CO regimen is useful in Rx ofMetastatic breast cancerAdvanced endometrial sarcomaGestational trophoblastic neoplasiaOvarian tumor with peritoneal implants  <response>: EMA-CO a cyclic non-cross-resistant combina on of etoposide, methotrexate, and dactinomycin alternating with cyclophosphamide and vincristine. 