title: [Undifferentiated prostate sarcoma with cartilage metaplasia: a case report and review of the literature].
abstract: OBJECTIVE
  To investigate the clinical presentations and pathologic features of undifferentiated sarcoma of the prostate with cartilage metaplasia, and to clarify its category.
  
  
  METHODS
  We analyzed the clinical data of a case of undifferentiated sarcoma of the prostate with cartilage metaplasia treated by surgical resection. The tumor tissue was subjected to routine HE and immunohistochemical staining, its histological structure and immunohistochemical expression were observed under the light microscope, and relevant literature on its manifestations was reviewed.
  
  
  RESULTS
  The case was pathologically diagnosed as gray prostate tumor, with chondrosarcomatous and undifferentiated malignant mesenchymal components under the light microscope. Immunohistochemical staining revealed vimentin (+), local CD117 (+/-), SMA (-), Des (-), myoglobin (-), CD34 (-), CK7 (-), and CK8 (-). Tumor metastasis was found 2 months after the operation, and the patient died 4 months later.
  
  
  CONCLUSIONS
  Undifferentiated sarcoma of the prostate with cartilage metaplasia is a very rare and highly malignant aggressive tumor, which can be diagnosed by biopsy and immunohistochemistry.
authors: Tianjin Institute of Urology, Tianjin Medical University, Tianjin 300210, China.
authors: Jing
authors: J
authors: Chen
authors: Chang-yi
authors: CY
authors: Quan
authors: Ji-wu
authors: JW
authors: Chang
authors: Yu-ming
authors: YM
authors: Yang
authors: Bo
authors: B
authors: Li
authors: Wen-liang
authors: WL
authors: Chang
authors: Jiang
authors: J
authors: Wang
authors: Bao
authors: B
authors: Jin
authors: Yuan-jie
authors: YJ
authors: Niu
mesh_terms: D000328:Adult; D002356:Cartilage / Q000473:pathology*; D006801:Humans; D008297:Male; D008679:Metaplasia; D011467:Prostate / Q000473:pathology*; D011471:Prostatic Neoplasms / Q000175:diagnosis / Q000473:pathology*; D012509:Sarcoma / Q000175:diagnosis / Q000473:pathology*