title: [Peculiarities in the development of the superior semicircular canal].
abstract: OBJECTIVE
  Our objective was to study the ontogeny of the superior semicircular canal in order to describe its peculiarities.
  
  
  METHODS
  We analyzed 76 series of human embryos aged between 32 days (6mm) and newborns. The samples were cut serially and stained using Martin's trichrome technique.
  
  
  RESULTS
  In semicircular canal development there were a number of peculiarities, such as: a defined chronological sequence of osteogenesis with a variable rate of ossification; the fact that each nucleus of ossification was involved in the formation of one of its covers (the upper in the superficial and the lower in the deep); the appearance of transitory dehiscence; and canal closure by means of bone with laminar pattern, with a minimum thickness of 0.1mm.
  
  
  CONCLUSIONS
  The peculiarities in canal development could explain the origin of pathological dehiscence in the canal, whether congenital or acquired.
authors.affiliation: Servicio de Anatomía Patológica, Hospital Universitario Miguel Servet, Zaragoza, España.
authors.forename: Carmen
authors.initials: C
authors.lastname: Yus
authors.affiliation: Departamento de Anatomía e Histología Humanas, Universidad de Zaragoza, Zaragoza, España. Electronic address: aicisner@unizar.es.
authors.forename: Ana I
authors.initials: AI
authors.lastname: Cisneros
authors.affiliation: Departamento de Anatomía e Histología Humanas, Universidad de Zaragoza, Zaragoza, España.
authors.forename: Jesús
authors.initials: J
authors.lastname: Obón
authors.affiliation: Clínica Bilbao, Bilbao, Vizcaya, España.
authors.forename: Rafael
authors.initials: R
authors.lastname: Crovetto
authors.affiliation: Servicio de Otorrinolaringología, Hospital Universitario Miguel Servet, Zaragoza, España.
authors.forename: Jesús
authors.initials: J
authors.lastname: Fraile
authors.affiliation: Servicio de Otorrinolaringología, Hospital de Basurto, Bilbao, Vizcaya, España.
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Crovetto
authors.affiliation: Departamento de Anatomía e Histología Humanas, Universidad de Zaragoza, Zaragoza, España.
authors.forename: Jaime
authors.initials: J
authors.lastname: Whyte
mesh_terms: D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D012665:Semicircular Canals / Q000196:embryology* / Q000254:growth & development*
keywords: Canal semicircular superior; Dehiscence; Dehiscencia; Human; Humanos; Ontogenia; Ontogeny; Superior semicircular canal