title: Concurrent ovarian-type primary peritoneal adenocarcinoma and peritoneal choriocarcinoma. A case report and review of the literature.
abstract: BACKGROUND
  Nongestational choriocarcinomas are aggressive tumours occurring either as a global event or as a focal change in solid tumours. The latter is responsible for coexistence of trophoblastic histology with other malignancies.
  
  
  METHODS
  A 65-year old female with stage IV primary peritoneal carcinoma, ovarian type, underwent surgical cytoreduction followed by two courses of paclitaxel/carboplatin chemotherapy. A choriocarcinomatous component was later identified in the resection specimens, as chemotherapy resulted in a differential response of the two malignant variants. Commencement of EMA/CO chemotherapy (etoposide, methotrexate, actinomycin D, cyclophosphamide, vincristine) resulted in symptom palliation and tumour regression, further consolidated with platinum-based EP/EMA (etoposide, cisplatin, methotrexate, actinomycin D). Two months later, relentless choriocarcinomatous disease progression followed, leading to the patient's death while the peritoneal adenocarcinomatous variant remained biochemically quiescent.
  
  
  CONCLUSIONS
  Choriocarcinomas may coexist with typical ovarian-type peritoneal cancer, creating diagnostic and therapeutic dilemmas. Aggressive weekly chorio-type chemotherapy appears to be warranted despite the low likelihood of cure, as it provides significant symptom palliation.
authors.affiliation: CRC Department of Medical Oncology, Beatson Oncology Centre, Glasgow, UK. avassou@otenet.gr
authors.forename: G
authors.initials: G
authors.lastname: Pentheroudakis
authors.forename: J
authors.initials: J
authors.lastname: White
authors.forename: J
authors.initials: J
authors.lastname: Davis
authors.forename: I
authors.initials: I
authors.lastname: Brown
authors.forename: P
authors.initials: P
authors.lastname: Vasey
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery; D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D031954:Choriocarcinoma, Non-gestational / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D010051:Ovarian Neoplasms / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery; D010534:Peritoneal Neoplasms / Q000188:drug therapy* / Q000473:pathology / Q000601:surgery