Avtor/Urednik     Dolenšek, Janez; Cvetko, Erika; Snoj, Žiga; Meznarič, Marija
Naslov     Complete occipitalization of the atlas with bilateral external auditory canal atresia
Tip     članek
Leto izdaje     2017
Obseg     str. str.
ISSN     0930-1038 - Surgical and radiologic anatomy : SRA
Jezik     eng
Abstrakt     Fusion of the atlas with the occipital bone is a rare congenital dysplasia known as occipitalization of the atlas, occipitocervical synostosis, assimilation of the atlas, or atlanto-occipital fusion. It is a component of the paraxial mesodermal maldevelopment and commonly associated with other dysplasias of the craniovertebral junction. External auditory canal atresia or external aural atresia is a rare congenital absence of the external auditory canal. It occurs as the consequence of the maldevelopment of the first pharyngeal cleft due to defects of cranial neural crest cells migration and/or differentiation. It is commonly associated with the dysplasias of the structures derived from the first and second pharyngeal arches including microtia. We present the coexistence of the occipitalization of the atlas and congenital aural atresia, an uncommon combination of the paraxial mesodermal maldevelopment, and defects of cranial neural crest cells. The association is most probably syndromic as minimal diagnostic criteria for the oculoariculovertebral spectrum are fulfilled. From the clinical point of view, it is important to be aware that patients with microtia must obtain also appropriate diagnostic imaging studies of the craniovetebral junction due to eventual concomitant occipitalization of the atlas and frequently associated C1-C2 instability.
Proste vsebinske oznake     craniovertebral junction
canal atresia
microtia
kraniovertebralni spoj
kanala atrezija
mikrotija