Complete absence of the posterior arch of C1: Case report

Khanna, Raman; Za, Smith; Dlouhy, Brian J.; Ns, Dahdaleh

doi:10.4103/0974-8237.147090

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…Hypoplasia of the basiocciput and agenesis of the occipital condyles resulted in basilar invagination in our patient. Furthermore, although the Welcher basal angle was slightly greater than normal in this patient, we could not recognize the anthropometric elements of the platybasia, suggesting that basilar invagination and platybasia may be independent [8], [9]. The use of these measurements (lines, distances, and angles) helps the diagnosis of alterations of CVJ.…”

Section: Discussionmentioning

confidence: 64%

Agenesis of the posterior arch of the atlas and complex alterations of the craniovertebral junction: A case report

Madeddu

Cecchini²,

Mazzarello

et al. 2019

Radiology Case Reports

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The craniovertebral junction is a unique part of the somite-derived axial skeleton. The absence or hypoplasia of the posterior arch of C1 is frequently associated with compensatory hypertrophy of the anterior arch of C1 and of the spinous process of C2. Here, we report a patient with agenesis of the posterior arch of C1 without neurologic deficits. Our patient presented with complex alterations of the craniovertebral junction that involved interactions between the condyles, clivus, atlas, and epistropheus. To our knowledge, dislocation of the odontoid process above the Chamberlain line, including cranial migration of the anterior arch of C1, has not been reported in the literature.

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Section: Discussionmentioning

confidence: 64%

Agenesis of the posterior arch of the atlas and complex alterations of the craniovertebral junction: A case report

Madeddu

Cecchini²,

Mazzarello

et al. 2019

Radiology Case Reports

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“…Some studies have reported the incidence of cervical vertebra congenital anomalies at about 1 in 40,000 births, with a higher incidence in girls (17). Some studies have reported the prevalence of posterior anomalies in cervical vertebrae of about 0.15% (4,5). Anomalies in the first six cervical vertebrae are more likely to occur than other vertebrae in the whole of the spine (18,19).…”

Section: Discussionmentioning

confidence: 99%

“…These anomalies may range from a minor defect to the absence of posterior arch formation. The prevalence of these types of anomalies is reported about 0.15% (4,5). Although it might be no specific symptoms in these patients, and sometimes they are diagnosed accidentally.…”

Section: Introductionmentioning

confidence: 97%

Absence of the Posterior Element of C1 and C2 Along With Mild Wedge Shape in Body of C3: Case Report

Golchini,

Abdi,

Pourrahimi

et al. 2024

ACTA

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Due to the wide variety of cervical vertebral congenital anomalies, knowledge of their types and related clinical conditions can prove to be helpful for physicians and surgeons in the diagnosis and treatment of patients. The aim of this study is to report on a rare case of unstable cervical vertebral congenital anomaly in which the patient had a defect in the body of the C3 vertebra in addition to defects in the posterior arch of C1 and posterior element of C2. This type of anomaly has not been reported so far in the literature. To reduce the patient’s related neurological disorders, our treatment choice for this patient was occipitocervical fusion (OCF) surgery. At the 3-year postoperative follow-up, all sensory and motor problems related to this anomaly affecting the patient's upper and lower limbs and causing shoulder and neck pain were eliminated. In this rare type of anomaly, OCF surgery seems to be an effective choice in relieving the patient's neurological symptoms.

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“…A congenital defect of the posterior arch of the atlas is classified into five severity forms ranging from aplasia (absence of the entire arch including the tubercle) to simple clefts because of the incomplete posterior fusion of the two hemiarches above the midline. Dentists performing CBCT should be familiar with and identify these cervical abnormalities and avoid misdiagnosing them as fractures [ 44 , 45 ]. These anatomical variants of the atlas may cause pain in the cervical and head regions, cerebrovascular accidents and more.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Ponticulus Posticus and Migraine in 220 Orthodontic Patients: A Cross-Sectional Study

Macrì

Rendina

Feragalli

et al. 2023

Biology

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Background: Ponticulus posticus (PP) is a medical term that describes an anomaly of the atlas (C1), which has a complete or partial bone bridge over the vertebral artery (VA) groove. The purpose of the study is to estimate the prevalence of PP in patients with a diagnosis of migraine. Methods: Cone beam CT (CBCT) scans (n = 220) were reviewed for the detection of PP in the University “G. D’Annunzio” of Chieti in the Department of Medical, Oral and Biotechnological Sciences. The sample included 220 Italian patients between 18 and 87 years. Pearson chi-square analysis (p < 0.05 and 95% CI) was used to establish an association between migraine and PP. Results: The present study found a prevalence of PP of 20.9% and a prevalence of migraine of 12.272%. The association between migraine and PP was confirmed by the chi-square statistic, since the p-value was 0.008065 (significant at p < 0.05). PP was more frequent in the migraine without aura group, without a statistical difference relative to the migraine with aura group. Conclusions. The study concluded that PP is positively associated with migraine.

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Complete absence of the posterior arch of C1: Case report

Cited by 6 publications

References 8 publications

Agenesis of the posterior arch of the atlas and complex alterations of the craniovertebral junction: A case report

Agenesis of the posterior arch of the atlas and complex alterations of the craniovertebral junction: A case report

Absence of the Posterior Element of C1 and C2 Along With Mild Wedge Shape in Body of C3: Case Report

Prevalence of Ponticulus Posticus and Migraine in 220 Orthodontic Patients: A Cross-Sectional Study

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