title: High level of Ets-related gene expression has high specificity for prostate cancer: a tissue microarray study of 11 483 cancers.
abstract: OBJECTIVE
  TMPRSS2-ERG fusion resulting in strong Ets-related gene (ERG) overexpression occurs in about 50% of prostate cancers. This study was undertaken to determine the prevalence of ERG overexpression in other tumour types as well as in normal tissues.
  
  
  RESULTS
  A total of 11 483 tumours and 72 different normal tissue types were analysed in a tissue microarray format. Strong nuclear ERG overexpression was found in 36.7% of prostate carcinomas as well as in various vascular tumours, including Kaposi sarcomas (91.7%), angiosarcomas (100%) and haemangiomas (90.9%). Moderate to strong nuclear ERG immunostaining was also observed in thymoma (6.1%). Weak to moderate ERG staining was found in a small number of squamous cell carcinomas of the skin, squamous carcinomas of the lung, malignant mesotheliomas, carcinosarcomas of the uterus, gastrointestinal stromal tumours, hepatocellular carcinomas, teratomas of the testis, anaplastic carcinomas of the thyroid, giant cell tumours of the tendon sheath and benign fibrous histiocytomas of the skin. ERG overexpression was not seen in 8886 samples from 132 other tumour types and subtypes. Within normal tissues, immunohistochemically detectable ERG overexpression was restricted to endothelial cells and subsets of lymphocytes.
  
  
  CONCLUSIONS
  The high specificity of ERG expression in both normal and neoplastic tissues suggests a very narrow biological role for ERG in highly selected tissues.
authors.affiliation: Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany. s.minner@uke.uni-hamburg.de
authors.forename: Sarah
authors.initials: S
authors.lastname: Minner
authors.forename: Andreas M
authors.initials: AM
authors.lastname: Luebke
authors.forename: Martina
authors.initials: M
authors.lastname: Kluth
authors.forename: Carsten
authors.initials: C
authors.lastname: Bokemeyer
authors.forename: Fritz
authors.initials: F
authors.lastname: Jänicke
authors.forename: Jakob
authors.initials: J
authors.lastname: Izbicki
authors.forename: Thorsten
authors.initials: T
authors.lastname: Schlomm
authors.forename: Guido
authors.initials: G
authors.lastname: Sauter
authors.forename: Waldemar
authors.initials: W
authors.lastname: Wilczak
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis* / Q000235:genetics; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009369:Neoplasms / Q000235:genetics / Q000378:metabolism; D011471:Prostatic Neoplasms / Q000235:genetics* / Q000378:metabolism; D012680:Sensitivity and Specificity; D046888:Tissue Array Analysis; D015534:Trans-Activators / Q000032:analysis* / Q000096:biosynthesis; D000071230:Transcriptional Regulator ERG; D059467:Transcriptome
chemical_list: D014408:Biomarkers, Tumor; C072312:ERG protein, human; D015534:Trans-Activators; D000071230:Transcriptional Regulator ERG