title: Relationship between ABO blood groups and head and neck cancer among Greek patients.
abstract: OBJECTIVE
  We examined the association of ABO blood groups with the different types of head and neck cancers.
  
  
  METHODS
  195 diagnosed cases and 801 controls were selected from a Greek tertiary cancer center. Information regarding type of head and neck cancer and ABO blood group was collected and registered.
  
  
  RESULTS
  The O blood group was found to be most prevalent followed by A, B and AB among the controls, whereas blood group A followed by O, B and AB was most prevalent among cancer patients. The difference among the distribution between the cases and controls was statistically significant in blood group A (p<0.05), whereas blood group A had 1.52-fold higher risk of developing head and neck cancer compared to people of other blood groups.
  
  
  CONCLUSIONS
  Blood group A was found to be a potential risk factor for the development of head and neck cancers.
authors: Department of Otolaryngology and 2Endocrinogy, "Metaxa" Cancer Hospital, Botasi 51, Piraeus, Greece.
authors: Kassiani
authors: K
authors: Kakava
authors: Ioannis
authors: I
authors: Karelas
authors: Ioannis
authors: I
authors: Koutrafouris
authors: Savvas
authors: S
authors: Damianidis
authors: Paulos
authors: P
authors: Stampouloglou
authors: Georgios
authors: G
authors: Papadakis
authors: Antonios
authors: A
authors: Xenos
authors: Foteini
authors: F
authors: Krania
authors: Paulos
authors: P
authors: Sarof
authors: Georgios
authors: G
authors: Tasopoulos
authors: Nikolaos
authors: N
authors: Petridis
mesh_terms: D000017:ABO Blood-Group System; D000368:Aged; D005260:Female; D006258:Head and Neck Neoplasms / Q000097:blood* / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D000017:ABO Blood-Group System