Case report: Congenital absence of the dens

Bajaj, Manish; Jangid, Hemant; Vats, AK; Meena, ML

doi:10.4103/0971-3026.63050

Cited by 8 publications

(4 citation statements)

References 8 publications

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“…Complete agenesis of odontoid is extremely rare[ 17 22 ] and usually occurs in the context of collagenopathy syndromes such as spondyloepiphyseal and spondylometaphyseal dysplasias. [ 17 ] It appears as slight depression[ 23 ] between the superior articular facets on open mouth view [ Figure 6 ]. Agenesis or hypogenesis of just the basal segment results in a stumpy dental pivot with a floating apical ossicle.…”

Section: Embryology and Developmental Anomalies Of Odontoidmentioning

confidence: 99%

CT and MR imaging of odontoid abnormalities: A pictorial review

Jain

Verma

Garga

et al. 2016

Indian Journal of Radiology and Imaging

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Odontoid process is the central pillar of the craniovertebral junction. Imaging of this small structure continues to be a challenge for the radiologists due to complex bony and ligamentous anatomy. A wide range of developmental and acquired abnormalities of odontoid have been identified. Their accurate radiologic evaluation is important as different lesions have markedly different clinical course, patient management, and prognosis. This article seeks to provide knowledge for interpreting appearances of odontoid on computed tomography (CT) and magnetic resonance imaging (MRI) with respect to various disease processes, along with providing a quick review of the embryology and relevant anatomy.

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Section: Embryology and Developmental Anomalies Of Odontoidmentioning

confidence: 99%

CT and MR imaging of odontoid abnormalities: A pictorial review

Jain

Verma

Garga

et al. 2016

Indian Journal of Radiology and Imaging

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“…The dens can even be completely absent. 9 Early in childhood, vertical epiphyseal clefts at the dorsal portion of the vertebra can be visible along the whole spine (►Fig. 2) and should not be misinterpreted as pathology.…”

Section: Ossification Centers and Growth Platesmentioning

confidence: 99%

The Great Mimickers of Spinal Pathology

Farshad‐Amacker

Sutter

2022

Semin Musculoskelet Radiol

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Back pain is one of the leading causes of health costs worldwide, particularly because of the further increased aging population. After clinical examination, spinal imaging is of utmost importance in many patients to reach the correct diagnosis. There are many imaging pitfalls and mimickers of spinal pathology on radiographs, magnetic resonance imaging, and computed tomography. These mimickers may lead to a misdiagnosis or a further imaging work-up if they are not recognized and thus lead to unnecessary examinations and increased health care costs. In this review we present the common mimickers of spinal pathology and describe normal variations when reading imaging studies of the spine.

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“…Between the ages of 3 years and 6 years, a secondary ossification center appears and fuses with the remaining dens by the age of 12 years. [ 3 ] Congenital anomalies of the odontoid process are rare and can be identified as os odontoideum, ossiculum terminale, aplasia-hypoplasia, and duplication of the dens. [ 3 ]…”

Section: Case Reportmentioning

confidence: 99%

“…[ 3 ] Congenital anomalies of the odontoid process are rare and can be identified as os odontoideum, ossiculum terminale, aplasia-hypoplasia, and duplication of the dens. [ 3 ]…”

Section: Case Reportmentioning

confidence: 99%

Congenital defects of C1 arches and odontoid process in a child with Down′s syndrome: A case presentation

Hatzantonis

Muquit

Nasto

et al. 2016

J Craniovert Jun Spine

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We present the case of a 2-year-old child with Down's syndrome who presented to our unit with torticollis. Imaging studies revealed the rare occurrence of anterior and posterior C1 arch defects, absent odontoid process, and atlantoaxial subluxation. We managed her conservatively for 3 years without neurological deficits or worsening of atlantoaxial subluxation. We discuss the rare occurrences of anterior and posterior arch defects of the atlas, the radiological presentations of axis defects in patients, and the occurrence of atlantoaxial instability in patients with Down's syndrome. Management options with consideration to surgery in asymptomatic and symptomatic patients are also discussed.

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Case report: Congenital absence of the dens

Abstract: A 36-year-old man presented with headache and right upper and lower limb weakness for 10 days. MRI revealed absence of the odontoid process of the C2 vertebral body, with resultant atlantoaxial dislocation along with myelomalacic changes involving the cervicomedullary junction.

Cited by 8 publications

References 8 publications

CT and MR imaging of odontoid abnormalities: A pictorial review

CT and MR imaging of odontoid abnormalities: A pictorial review

The Great Mimickers of Spinal Pathology

Congenital defects of C1 arches and odontoid process in a child with Down′s syndrome: A case presentation

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