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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 19 (1998), S. 295-298 
    ISSN: 1279-8517
    Keywords: Ethmoidal labyrinth ; Frontal sinus ; Anterior cranial fossa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In the “standard” anatomic description, the frontal bone and cribriform plate of the ethmoid bone form the base of the anterior cranial fossa. We studied the development of the ethmoidal bone as well as its relations to the frontal bone in macerated disarticulated skull bones and macerated skull bases of 35 individuals between 9 and 35 years of age. In 19 cases the ethmoidal cells were completely or partly uncovered by the frontal bone. In 6 of 19 cases the frontal bone did not cover any of the ethmoidal cells; in 10 further cases the frontal bone covered only the anterior and in 3 cases the anterior and middle ethmoidal cells. In a 60-year-old subject the ethmoidal cells were incorporated in the base of the anterior cranial fossa, a rare finding. Thus, a depressed lamina cribrosa is not the only danger in ethmoidectomy. Based on the present data ethmoidal cells uncovered by the frontal bone may involve a serious risk during ethmoidectomy even if the surgeon remains lateral to the insertion of the middle concha. The discrepancy between common descriptions of this region and our own findings may be related to imprecise data concerning the life stage of the cases described in the literature.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 19 (1997), S. 295-298 
    ISSN: 1279-8517
    Keywords: Ethmoidal labyrinth ; Frontal sinus ; Anterior cranial fossa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Dans la description anatomique "standard", l'os frontal et la lame criblée de l'os ethmoïde constituent le plancher de la fosse crânienne antérieure. Nous avons étudié le développement de l'os ethmoïde ainsi que ses relations avec l'os frontal sur des crânes désarticulés et sur des bases de crânes de 35 individus âgés de 9 à 35 ans. Dans 19 cas, les cellules ethmoïdales étaient complètement ou partiellement découvertes par l'os frontal. Dans 6 de ces 19 cas, l'os frontal ne couvrait pas du tout les cellules ethmoïdales ; dans les 10 autres cas, l'os frontal recouvrait seulement les cellules antérieures, et dans 3 cas, les cellules antérieures et moyennes de l'os ethmoïde. Chez un individu de 60 ans, les cellules ethmoïdales étaient également incorporées dans le plancher de la fosse crânienne antérieure, ce qui est très rare. De ce fait, une lame criblée basse n'est pas le seul danger au cours de l'ethmoïdectomie. D'après nos résultats, les cellules ethmoïdales découvertes par l'os frontal peuvent représenter un risque sérieux au cours d'une ethmoïdectomie même si le chirurgien, au cours de la procédure, reste latéral par rapport à l'insertion du cornet nasal moyen. Les contradictions entre la description classique de cette région et nos résultats pourraient suggérer l'existence d'imprécisions dans la littérature, liées à l'absence de prise en compte de l'âge des crânes étudiés.
    Notes: Summary In the “standard” anatomic description, the frontal bone and cribriform plate of the ethmoid bone form the base of the anterior cranial fossa. We studied the development of the ethmoidal bone as well as its relations to the frontal bone in macerated disarticulated skull bones and macerated skull bases of 35 individuals between 9 and 35 years of age. In 19 cases the ethmoidal cells were completely or partly uncovered by the frontal bone. In 6 of 19 cases the frontal bone did not cover any of the ethmoidal cells; in 10 further cases the frontal bone covered only the anterior and in 3 cases the anterior and middle ethmoidal cells. In a 60-year-old subject the ethmoidal cells were incorporated in the base of the anterior cranial fossa, a rare finding. Thus, a depressed lamina cribrosa is not the only danger in ethmoidectomy. Based on the present data ethmoidal cells uncovered by the frontal bone may involve a serious risk during ethmoidectomy even if the surgeon remains lateral to the insertion of the middle concha. The discrepancy between common descriptions of this region and our own findings may be related to imprecise data concerning the life stage of the cases described in the literature.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
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