title: Differential expression of epidermal growth factor receptor, c-Met, and HER2/neu in chordoma compared with 17 other malignancies.
abstract: OBJECTIVE
  To examine the expression of c-Met, c-Erb-b2 (HER2/neu), and epidermal growth factor (EGFR) in a cohort of 12 chordomas, based on the current and future availability of targeted molecular inhibitors.
  
  
  METHODS
  Protein expression levels were analyzed by immunohistochemical analysis from archival tissue using multitumored tissue microarray and by Spearman rank correlation test.
  
  
  METHODS
  Tertiary care facility.
  
  
  METHODS
  We assembled the cohort of 12 chordomas from patients treated at the Yale-New Haven Hospital from 1986 to 2003 and compared them with 51 other tumors from 17 assorted solid tissue tumor types along with 1 sample of healthy tissue from each site.
  
  
  METHODS
  The expression of c-Met, HER2/neu, and EGFR.
  
  
  RESULTS
  Most chordomas displayed strong expression of EGFR and c-Met, whereas a variable level of expression of HER2/neu was seen. In addition, we noted a strong correlation between EGFR and c-Met expression, especially for primary chordomas (P = .006).
  
  
  CONCLUSIONS
  Chordomas, like many other solid-tissue tumors, express HER2/neu, EGFR, and the hepatocyte growth factor/scatter factor receptor c-Met. Most chordomas had strong expression of both the hepatocyte growth factor/scatter factor receptor and EGFR. Inhibitors to EGFR are already in clinical use for other solid-tissue tumors and represent a potentially viable experimental treatment option for refractory chordoma. Further studies are required to investigate these findings.
authors.affiliation: Section of Otolaryngology, Yale University, New Haven, CT 06520-8041, USA.
authors.forename: Paul M
authors.initials: PM
authors.lastname: Weinberger
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Yu
authors.forename: Diane
authors.initials: D
authors.lastname: Kowalski
authors.forename: John
authors.initials: J
authors.lastname: Joe
authors.forename: Phillip
authors.initials: P
authors.lastname: Manger
authors.forename: Amanda
authors.initials: A
authors.lastname: Psyrri
authors.forename: Clarence T
authors.initials: CT
authors.lastname: Sasaki
mesh_terms: D000293:Adolescent; D000368:Aged; D000369:Aged, 80 and over; D002817:Chordoma / Q000378:metabolism*; D066246:ErbB Receptors / Q000378:metabolism*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000378:metabolism; D019859:Proto-Oncogene Proteins c-met / Q000378:metabolism*; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000378:metabolism*; D018709:Statistics, Nonparametric
chemical_list: D066246:ErbB Receptors; D019859:Proto-Oncogene Proteins c-met; D018719:Erb-b2 Receptor Tyrosine Kinases