Changing Perception but Unaltered Reality: How Effective Is C1-C2 Fixation for Chiari Malformations without Instability?

2020 ◽  
Vol 136 ◽  
pp. e234-e244 ◽  
Author(s):  
Pravin Salunke ◽  
Madhivanan Karthigeyan ◽  
Puneet Malik ◽  
Chirag Panchal
2011 ◽  
Vol 34 (22) ◽  
pp. 1-6 ◽  
Author(s):  
Jorge Daniel Oldan ◽  
Almamoon I. Justaniah ◽  
Sami H. Erbay

2021 ◽  
Author(s):  
Amir Kershenovich

Abstract BACKGROUND Different conditions of the posterior fossa such as Chiari malformations, tumors, and arachnoid cysts require surgery through a suboccipital approach, for which a typical midline vertical linear incision is used. Curvilinear incisions have been carried in all other scalp regions other than the sub region for better cosmetic outcomes; a vertical curvilinear incision in the occipital and suboccipital region has not been reported. OBJECTIVE To evaluate the cosmetic value and safety of the “3 on a stick” vertical suboccipital curvilinear incision. METHODS We compared curvilinear to linear incisions, considering the scar's width, color, how conspicuous, and how well the scar could be covered by hair naturally. RESULTS Between 2010 and 2016, 68 children with Chiari I malformation were surgically intervened. The curvilinear incision was performed in 56 (82.4%) while a linear incision in 12 (17.6%) children. There were only 2 (2.9%) wound related complications (superficial dehiscences) in the curvilinear group and 1 additional dehiscence in a linear incision case. There were no neural or vascular complications. Scars were very similar among the 2 groups; both were equally conspicuous but curvilinear ones seemed to get covered better by hair. CONCLUSION The “3 on a stick” curvilinear incision of the suboccipital region is safe and allows for better hair coverage of the scar. It can be used for multiple conditions requiring a midline suboccipital or even occipital approach, such as Chiari malformations, tumors, and cysts.


2014 ◽  
Vol 48 (6) ◽  
pp. 621
Author(s):  
Kejian Lian ◽  
Dasheng Lin ◽  
Zhenqi Ding ◽  
Yanjie Guo
Keyword(s):  

2019 ◽  
Vol 121 ◽  
pp. e70-e76 ◽  
Author(s):  
Rui Zong ◽  
Teng Li ◽  
Lenian Lu ◽  
Guangyu Qiao ◽  
Xinguang Yu

1993 ◽  
Vol 32 (3) ◽  
pp. 189-190 ◽  
Author(s):  
Joseph Dooley ◽  
Daniel Vaughan ◽  
Michael Riding ◽  
Peter Camfield

The association of neurofibromatosis type 1 (NF1) with Chiari malformations of the cerebellum and brain stem has been reported on only two previous occasions.1,2 The pathogenesis of both conditions has remained unclear, although the Chiari type I malformation is most likely due to hypoplasia of the posterior fossa with subsequent extension of the cerebellum through the foramen magnum.3 NF1 is also associated with a variety of cerebral dysplasias.4 We present a patient with both of these dysplastic lesions whose Chiari malformation was asymptomatic.


2017 ◽  
Vol 7 (3) ◽  
pp. 239-245 ◽  
Author(s):  
Nitin Bhatia ◽  
Asheen Rama ◽  
Brandon Sievers ◽  
Ryan Quigley ◽  
Michelle H. McGarry ◽  
...  

Study Design: Biomechanical, cadaveric study. Objectives: To compare the relative stiffness of unilateral C1 lateral mass-C2 intralaminar fixation to intact specimens and bilateral C1 lateral mass-C2 intralaminar constructs. Methods: The biomechanical integrity of a unilateral C1 lateral mass-C2 intralaminar screw construct was compared to intact specimens and bilateral C1 lateral mass-C2 intralaminar screw constructs. Five human cadaveric specimens were used. Range of motion and stiffness were tested to determine the stiffness of the constructs. Results: Unilateral fixation significantly decreased flexion/extension range of motion compared to intact ( P < .001) but did not significantly affect axial rotation ( P = .3) or bending range of motion ( P = .3). There was a significant decrease in stiffness in extension for both unilateral and bilateral fixation techniques compared to intact ( P = .04 and P = .03, respectively). There was also a significant decrease in stiffness for ipsilateral rotation for the unilateral construct compared to intact ( P = .007) whereas the bilateral construct significantly increased ipsilateral rotation stiffness compared to both intact and unilateral fixation ( P < .001). Conclusion: Bilateral constructs did show improved biomechanical properties compared to the unilateral constructs. However, unilateral C1-C2 fixation using a C1 lateral mass and C2 intralaminar screw-rod construct decreased range of motion and improved stiffness compared to the intact state with the exception of extension and ipsilateral rotation. Hence, a unilateral construct may be acceptable in clinical situations in which bilateral fixation is not possible, but an external orthosis may be necessary to achieve a fusion.


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