title: [Endometrial stromal sarcoma with multi-differentiation: a study of 17 cases].
abstract: OBJECTIVE
  To investigate the clinical and pathomorphological features of multi-differentiated endometrial stromal sarcoma of the uterus and to discuss their behaviour and differential diagnosis.
  
  
  METHODS
  The histological characteristics of all cases were observed by pathological examination, some of them have been studied by immunohistochemical and/or ultrastructural techniques.
  
  
  RESULTS
  Multi-differentiation was present in 13 cases of low grade and 4 cases of high grade endometrial stromal sarcoma, of which, 13 cases had sex-cord differentiation, 10 cases had smooth muscle differentiation, osseous differentiation in 2 cases and striated muscle differentiation in 1 case. Two types of multi-differentiation was present in 9 cases.
  
  
  CONCLUSIONS
  Both low-grade and high-grade endometrial stromal sarcoma of uterus can display multi-differentiation. Sex-cord and smooth muscle differentiation are the most common types. Osseous and striated muscle differentiation are very rare. There is no definite correlation between prognosis and the amount or types of multi-differentiation components.
authors.affiliation: Department of Pathology, The second center-hospital of Tianjin, Tianjin 300120, China.
authors.forename: L
authors.initials: L
authors.lastname: Fan
authors.forename: D
authors.initials: D
authors.lastname: Guo
authors.forename: T
authors.initials: T
authors.lastname: Ma
authors.forename: W
authors.initials: W
authors.lastname: Wu
mesh_terms: D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D016889:Endometrial Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D018198:Mixed Tumor, Malignant / Q000473:pathology* / Q000601:surgery; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D011379:Prognosis; D018203:Sarcoma, Endometrial Stromal / Q000473:pathology* / Q000601:surgery; D014599:Uterus / Q000473:pathology