title: Primary Ewing's sarcoma-primitive neuroectodermal tumor of the uterus: a case report and literature review.
abstract: BACKGROUND
  Primary Ewing's sarcoma-primitive neuroectodermal tumor (ES-PNET) of the uterus is an extremely rare malignancy.
  
  
  METHODS
  A 30-year-old Korean woman presented with abnormal uterine bleeding with uterine enlargement. A computed tomography (CT) scan and magnetic resonance imaging (MRI) of the abdomen and pelvis showed a huge uterine mass measuring 18 x 20 x 21 cm, metastasis to both pelvic and para-aortic lymph nodes, and omental infiltration. The pathology report of the uterine mass described a uniformly hypercellular tumor, which was arranged in diffuse solid sheets of uniform, small, rounded, and sometimes spindle-shaped cells, with scanty cytoplasm. Immunohistochemically, the mass tested positive for vimentin, CD99, and chromogranin. The patient received several courses of combination chemotherapy and radiotherapy but died from tumor progression 16 months after the initial diagnosis.
  
  
  CONCLUSIONS
  This is a rare case of primary uterine ES-PNET in a woman of reproductive age. A review of the literature indicates that primary uterine ES-PNET requires early diagnosis and multimodality treatment including surgery, chemotherapy, and radiotherapy. The behavior of this tumor is potentially aggressive.
authors.affiliation: Center for Uterine Cancer, Research Institute and Hospital, National Cancer Center, 809 Madu1-dong, Ilsan-gu, Goyang-si, Gyeonggi-do, 411-351, Korea.
authors.forename: Jeong-Yeol
authors.initials: JY
authors.lastname: Park
authors.forename: Sun
authors.initials: S
authors.lastname: Lee
authors.forename: Hyoung Jin
authors.initials: HJ
authors.lastname: Kang
authors.forename: Hy-Sook
authors.initials: HS
authors.lastname: Kim
authors.forename: Sang-Yoon
authors.initials: SY
authors.lastname: Park
mesh_terms: D000328:Adult; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D018241:Neuroectodermal Tumors, Primitive, Peripheral / Q000473:pathology* / Q000628:therapy; D012512:Sarcoma, Ewing / Q000473:pathology* / Q000628:therapy; D014594:Uterine Neoplasms / Q000473:pathology* / Q000628:therapy