title: Anatomical study of the sphenopalatine foramen.
abstract: Anatomical variations of the sphenopalatine foramen may correspond to alterations at the arterial nasal irrigation input, which is a relevant condition to treat severe epistaxis through ligation of the sphenopalatine artery.
  
  
  OBJECTIVE
  To study the sphenopalatine foramen in terms of its numeric variation and its location on the lateral nasal wall in relation to the bony ethmoidal crest of the palatine bone.
  
  
  METHODS
  The anatomical studies were carried out in 54 hemifaces.
  
  
  RESULTS
  the sphenopalatine foramen presented the following numeric variation: single (87%, or 47 specimens), double (11,1%, or 6 specimens), and triple (1.9% or one specimen); it was located at the superior nasal meatus in 81.5%, or 44 specimens; 14.8% (8 specimens) between the middle and superior nasal meatus and in the middle nasal meatus in only one case (1.9%).
  
  
  CONCLUSIONS
  We have been able to show a numeric variation of the SPF, its relation with the bony ethmoidal crest and its location in the superior meatus, middle meatus, and in both.
authors.affiliation: Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo.
authors.forename: Adriana Bernardini Antunes
authors.initials: AB
authors.lastname: Scanavine
authors.forename: João Adolfo Caldas
authors.initials: JA
authors.lastname: Navarro
authors.forename: Silvia Regina Molinari de Carvalho Leitão
authors.initials: SR
authors.lastname: Megale
authors.forename: Wilma Terezinha
authors.initials: WT
authors.lastname: Anselmo-Lima
mesh_terms: D002102:Cadaver; D006801:Humans; D009296:Nasal Cavity / Q000033:anatomy & histology*; D010159:Palate / Q000033:anatomy & histology*; D013100:Sphenoid Bone / Q000033:anatomy & histology*