title: Lympho-vascular invasion in BRCA related breast cancer compared to sporadic controls.
abstract: BACKGROUND
  Germline mutations in the BRCA1 gene predispose to the development of breast cancer, exhibiting a specific histological phenotype. Identification of possible hallmarks of these tumors is important for selecting patients for genetic screening and provides inside in carcinogenetic pathways.Since BRCA1-associated breast cancers have pushing borders that prevent them from easily reaching vessels and are often of the medullary (like) type that is known to have a low rate of lympho-vascular invasion (LVI), we hypothesized that absence of LVI could characterize BRCA1 related breast cancer.
  
  
  METHODS
  A population of 68 BRCA1 related invasive breast cancers was evaluated for LVI by an experienced breast pathologist blinded to mutation status, and compared to a control group matched for age, grade and tumor type.
  
  
  RESULTS
  LVI was present in 25.0% of BRCA1 related cases, compared to 20.6% of controls (P = 0.54, OR = 1.29, CI 0.58-2.78).
  
  
  CONCLUSIONS
  LVI is frequent in BRCA1 germline mutation related breast cancers, but seems to occur as often in sporadic controls matched for age, grade and tumor type. Apparently, these hereditary cancers find their way to the blood and lymph vessels despite their well demarcation and often medullary differentiation.
authors.affiliation: Department of Pathology, University Medical Center Utrecht, The Netherlands.
authors.forename: Marise R
authors.initials: MR
authors.lastname: Heerma van Voss
authors.forename: Petra
authors.initials: P
authors.lastname: van der Groep
authors.forename: Jos
authors.initials: J
authors.lastname: Bart
authors.forename: Elsken
authors.initials: E
authors.lastname: van der Wall
authors.forename: Paul J
authors.initials: PJ
authors.lastname: van Diest
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000098:blood supply* / Q000235:genetics* / Q000473:pathology; D016022:Case-Control Studies; D005260:Female; D019398:Genes, BRCA1; D020022:Genetic Predisposition to Disease; D018095:Germ-Line Mutation; D006801:Humans; D042601:Lymphatic Vessels / Q000473:pathology; D009389:Neovascularization, Pathologic / Q000235:genetics / Q000473:pathology
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