Atlantoaxial instability in a 7-year-old boy associated with traumatic disrupture of the ossiculum terminale (apical odontoid epiphysis)

1995 ◽  
Vol 4 (4) ◽  
pp. 248-251 ◽  
Author(s):  
B. Swoboda ◽  
H. Hirschfelder ◽  
D. Hohmann
Keyword(s):  
Atlantoaxial Instability ◽  
Ossiculum Terminale

scholarly journals "Orthotopic" ossiculum terminale persistens and atlantoaxial instability in a child less than 12 years of age: a case report and review of the literature

Cases Journal ◽  
2009 ◽  
Vol 2 (1) ◽  
pp. 8530 ◽  
Author(s):  
Ashwin Viswanathan ◽  
William E Whitehead ◽  
Thomas G Luerssen ◽  
Anna Illner ◽  
Andrew Jea
Keyword(s):  
Case Report ◽  
Atlantoaxial Instability ◽  
Review Of The Literature ◽  
Ossiculum Terminale

Odontoid cervical gout causing atlantoaxial instability: case report

2019 ◽  
Vol 30 (4) ◽  
pp. 541-544
Author(s):  
Justin Slavin ◽  
Marcello DiStasio ◽  
Paul F. Dellaripa ◽  
Michael Groff
Keyword(s):  
Rheumatoid Arthritis ◽  
Spinal Cord ◽  
Case Report ◽  
Physical Examination ◽  
Odontoid Process ◽  
Signs And Symptoms ◽  
Cord Compression ◽  
Atlantoaxial Instability ◽  
Posterior Stabilization ◽  
Rotatory Subluxation

The authors present a case report of a patient discovered to have a rotatory subluxation of the C1–2 joint and a large retroodontoid pannus with an enhancing lesion in the odontoid process eventually proving to be caused by gout. This patient represented a diagnostic conundrum as she had known prior diagnoses of not only gout but also sarcoidosis and possible rheumatoid arthritis, and was in the demographic range where concern for an oncological process cannot fully be ruled out. Because she presented with signs and symptoms of atlantoaxial instability, she required posterior stabilization to reduce the rotatory subluxation and to stabilize the C1–2 instability. However, despite the presence of a large retroodontoid pannus, she had no evidence of spinal cord compression on physical examination or imaging and did not require an anterior procedure to decompress the pannus. To confirm the diagnosis but avoid additional procedures and morbidity, the authors proceeded with the fusion as well as a posterior biopsy to the retroodontoid pannus and confirmed a diagnosis of gout.

Os Odontoideum with Posterior Atlantoaxial Instability

Spine ◽  
1991 ◽  
Vol 16 (7) ◽  
pp. 706-715 ◽  
Author(s):  
NOBUKI SHIRASAKI ◽  
KOZO OKADA ◽  
SHIRO OKA ◽  
NOBORU HOSONO ◽  
KAZUO YONENOBU ◽  
...  
Keyword(s):  
Atlantoaxial Instability ◽  
Os Odontoideum

Use of a titanium mesh cage for posterior atlantoaxial arthrodesis

2002 ◽  
Vol 96 (1) ◽  
pp. 127-130 ◽  
Author(s):  
Morio Matsumoto ◽  
Kazuhiro Chiba ◽  
Takashi Tsuji ◽  
Hirofumi Maruiwa ◽  
Yoshiaki Toyama ◽  
...  
Keyword(s):  
Donor Site ◽  
Atlantoaxial Instability ◽  
Os Odontoideum ◽  
Posterior Arch ◽  
Rigid Fixation ◽  
Titanium Mesh ◽  
Content Type ◽  
Atlantoaxial Fixation ◽  
Mesh Cage ◽  
Atlantoaxial Arthrodesis

✓ The authors placed titanium mesh cages to achieve posterior atlantoaxial fixation in five patients with atlantoaxial instability caused by rheumatoid arthritis or os odontoideum. A mesh cage packed with autologous cancellous bone was placed between the C-1 posterior arch and the C-2 lamina and was tightly connected with titanium wires. Combined with the use of transarticular screws, this procedure provided very rigid fixation. Solid fusion was achieved in all patients without major complications. The advantages of this method include more stable fixation, better control of the atlantoaxial fixation angle, and reduced donor-site morbidity compared with a conventional atlantoaxial arthrodesis in which an autologous iliac crest graft is used.

Posterior Circulation Stroke due to Atlantoaxial Instability in CHST3-Related Skeletal Dysplasia

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Arjun Dhawale ◽  
Shruti Bajaj ◽  
Kshitij Chaudhary ◽  
Tushar Agarwal ◽  
Sandeep Garg ◽  
...  
Keyword(s):  
Skeletal Dysplasia ◽  
Posterior Circulation ◽  
Atlantoaxial Instability ◽  
Posterior Circulation Stroke

scholarly journals Biomechanical evaluation of three ventral fixation methods for canine atlantoaxial instability: a cadaveric study

2017 ◽  
Vol 79 (2) ◽  
pp. e1-e1
Author(s):  
Fumitaka TAKAHASHI ◽  
Takaharu HAKOZAKI ◽  
Nobuo KANNO ◽  
Yasuji HARADA ◽  
Shinya YAMAGUCHI ◽  
...  
Keyword(s):  
Cadaveric Study ◽  
Atlantoaxial Instability ◽  
Fixation Methods ◽  
Biomechanical Evaluation

scholarly journals Agenesis of the posterior arch of the atlas

2002 ◽  
Vol 57 (2) ◽  
pp. 73-76 ◽  
Author(s):  
Martin Torriani ◽  
José Leonardo Goes Lourenço
Keyword(s):  
Computerized Tomography ◽  
Congenital Abnormality ◽  
Structural Instability ◽  
Neurological Deficits ◽  
Atlantoaxial Instability ◽  
Posterior Arch ◽  
Rare Entity ◽  
Radiological Findings ◽  
Plain Films ◽  
Rare Congenital Abnormality

PURPOSE: To illustrate the radiological findings and review the current literature concerning a rare congenital abnormality of the posterior arch of the atlas. CASE REPORT: An adult female without neurological symptoms presented with an absent posterior arch of the atlas, examined with plain films and helical computerized tomography. Complete agenesis of the posterior arch of the atlas is a rare entity that can be easily identified by means of plain films. Although it is generally asymptomatic, atlantoaxial instability and neurological deficits may occur because of structural instability. Computerized tomography provides a means of assessing the extent of this abnormality and can help evaluate the integrity of neural structures. Although considered to be rare entities, defects of the posterior arch of the atlas may be discovered as incidental asymptomatic findings in routine cervical radiographs. Familiarity with this abnormality may aid medical professionals in the correct management of these cases.

Pharyngeal Abscess Resulting in a Fusion of the Skullbase-Cl-C2

2000 ◽  
Vol 13 (2) ◽  
pp. 265-268
Author(s):  
M. Birch-Iensen
Keyword(s):  
Contrast Enhancement ◽  
Clinical Examination ◽  
White Male ◽  
Head Rotation ◽  
Drug Addict ◽  
Atlantoaxial Instability ◽  
Retropharyngeal Space ◽  
Severe Limitation ◽  
Rotatory Dislocation ◽  
Pharyngeal Abscess

A 46-year-old white male drug addict presented with a retropharyngeal space mass. Clinical examination was suggestive of an abscess which was confirmed by radiological examination which also showed contrast enhancement in the prevertebral and epidural space from the skullbase to the C5 level. The abscess was incised and antibiotics administered. The following year, atlantoaxial instability and a rotatory dislocation of C1 on C2 was found and two years after treatment a rotatory dislocation of C1 on C2 with a fusion between the skullbase, C1 and C2 was found, a complication not previously reported. His complaints at this stage consisted of L'Hermitte symptoms and severe limitation on head rotation.

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