KASMEJ

Kastamonu Medical Journal regularly publishes internationally qualified issues in the field of Medicine in the light of up-to-date information.

EndNote Style
Index
Original Article
Dural splitting has similar therapeutic efficacy with less complications, shorter operative and hospitalization times when compared to duraplasty in chiari type-I malformation
Aim: A standard surgical technique has not been developed for Chiari Type-1 malformation. Recently, dural-splitting has also been introduced in addition to duraplasty. We aimed to determine both surgical techniques’ advantages/disadvantages clinically and radiologically. Methods: We retrospectively evaluated 28 patients’ data with Chiari Type-I malformation and operated at the Neurosurgery Department of Bülent Ecevit University between January 2014 and April 2018. We retrieved demographic characteristics, symptoms, physical/neurological findings, preoperative/postoperative imaging data/measurements, Visual Analog Scale, Chicago Chiari Outcome Scale, Neck Disability Index, Neurological Scoring System, and the modified Japanese Orthopedic Association scores, operation and hospitalization times, and complications from the automation system. Results: Patients’ mean age was 38.5±13.0 years, and female/male ratio was 2.1/1. Syringomyelia was present in half of all cases. Mean tonsil herniation length was 11.64±4 mm, and mean tonsillo-dural distance was 4.18±1.7 mm. There were no significant relationships between tonsil herniation length and syringomyelia, and between tonsillo-dural distance and clinical improvement. Posterior fossa decompression was initially performed in all patients. Then, in 17 patients, duraplasty was performed. In 11 patients, dural-splitting was used. No significant differences were determined between duraplasty and dural-splitting regarding Visual Analog Scale, Chicago Chiari Outcome Scale, Neck Disability Index, Neurological Scoring System, and the modified Japanese Orthopedic Association scores. Significant differences were present, favoring dural-splitting regarding operation time, hospital stay, and complication rates. Conclusion: Posterior fossa decompression/duraplasty is an effective surgical technique to treat Chiari Type-I malformation. Posterior fossa decompression/dural-splitting is an optimal surgical alternative with a lower complication rate, shorter operation time, and hospitalization period.


1. Chiari H. Über Veränderungen des kleinhirns, des Pons und der MedullaOblongata in Folge von Congenitaler Hydrocephalie des Grosshirns.Dtsch Med Wochenschr. 1891; 17: 1172-5.
2. Nyland H, Krogness KG. Size of posterior fossa in Chiari type 1malformation in adults. Acta Neurochir (Wien) 1978; 40: 233-42.
3. Batzdorf U. Chiari I malformation with syringomyelia. Evaluation ofsurgical therapy by magnetic resonance imaging. J Neurosurg 1988; 68:726-30.
4. Cahan LD, Bentson JR. Considerations in the diagnosis and treatment ofsyringomyelia and the Chiari malformation. J Neurosurg 1982; 57: 24-31.
5. Aboulezz AO, Sartor K, Geyer CA, Gado MH. Position of cerebellar tonsils in the normal population and in patients with Chiari malformation: aquantitative approach with MR imaging. J Comput Assist Tomogr 1985;9: 1033-6.
6. Tavallaii A, Keykhosravi E, Rezaee H, Abouei Mehrizi MA, GhorbanpourA, Shahriari A. Outcomes of dura-splitting technique compared toconventional duraplasty technique in the treatment of adult Chiari Imalformation: a systematic review and meta-analysis. Neurosurg Rev2020.
7. Limonadi FM, Selden NR. Dura-splitting decompression of thecraniocervical junction: reduced operative time, hospital stay, and costwith equivalent early outcome. J Neurosurg 2004; 101: 184-8.
8. Schijman E, Steinbok P. International survey on the management of ChiariI malformation and syringomyelia. Childs Nerv Syst 2004; 20: 341-8.
9. Chotai S, Medhkour A. Surgical outcomes after posterior fossadecompression with and without duraplasty in Chiari malformation-I.Clin Neurol Neurosurg 2014; 125: 182-8.
10. Kotil K, Ton T, Tari R, Savas Y. Delamination technique together withlongitudinal incisions for treatment of Chiari I/syringomyelia complex: aprospective clinical study. Cerebrospinal Fluid Res 2009; 6: 7.
11. Milhorat TH, Chou MW, Trinidad EM, et al. Chiari I malformationredefined: clinical and radiographic findings for 364 symptomaticpatients. Neurosurgery 1999; 44: 1005-17.
12. Bao CS, Liu L, Wang B, et al. Craniocervical decompression with duraplastyand cerebellar tonsillectomy as treatment for Chiari malformation-Icomplicated with syringomyelia. Genet Mol Res 2015; 14: 952-60.
13. Gilmer HS, Xi M, Young SH. Surgical Decompression for ChiariMalformation Type I: An Age-Based Outcomes Study Based on theChicago Chiari Outcome Scale. World Neurosurg 2017; 107: 285-90.
14. Bejjani GK. Definition of the adult Chiari malformation: a brief historicaloverview. Neurosurg Focus 2001; 11: E1.
15. Behari S, Kalra SK, Kiran Kumar MV, Salunke P, Jaiswal AK, Jain VK.Chiari I malformation associated with atlanto-axial dislocation: focussingon the anterior cervico-medullary compression. Acta Neurochir (Wien)2007; 149: 41-50.
16. Klekamp J. Chiari I malformation with and without basilar invagination: acomparative study. Neurosurg Focus 2015; 38: E12.
17. Krieger MD, Falkinstein Y, Bowen IE, Tolo VT, McComb JG. Scoliosis andChiari malformation Type I in children. J Neurosurg Pediatr 2011; 7: 25-9.
18. Yuh WT, Kim CH, Chung CK, Kim HJ, Jahng TA, Park SB. SurgicalOutcome of Adult Idiopathic Chiari Malformation Type 1. J KoreanNeurosurg Soc 2016; 59: 512-7.
19. Greenberg JK, Milner E, Yarbrough CK, et al. Outcome methods usedin clinical studies of Chiari malformation Type I: a systematic review. JNeurosurg 2015; 122: 262-72.
20. Godil SS, Parker SL, Zuckerman SL, Mendenhall SK, McGirt MJ.Accurately measuring outcomes after surgery for adult Chiari Imalformation: determining the most valid and responsive instruments.Neurosurgery 2013; 72: 820-7.
21. Vakharia VN, Guilfoyle MR, Laing RJ. Prospective study of outcome offoramen magnum decompressions in patients with syrinx and non-syrinxassociated Chiari malformations. Br J Neurosurg 2012; 26: 7-11.
22. Feng W, Li L, Xu X, Liu J, Yang Y, Jiao Y. [Posterior atlantoaxial lateral massscrew fixation and suboccipital decompression for treatment of arnold-chiari malformation associated with atlantoaxial dislocation]. ZhongguoXiu Fu Chong Jian Wai Ke Za Zhi 2016; 30: 1404-7.
23. Ono A, Numasawa T, Wada K, et al. Surgical outcomes of foramenmagnum decompression for syringomyelia associated with Chiari Imalformation: relation between the location of the syrinx and body pain.J Orthop Sci 2010; 15: 299-304.
24. Ono A, Suetsuna F, Ueyama K, et al. Surgical outcomes in adult patientswith syringomyelia associated with Chiari malformation type I: therelationship between scoliosis and neurological findings. J NeurosurgSpine 2007; 6: 216-21.
25. Yarbrough CK, Greenberg JK, Smyth MD, Leonard JR, Park TS, LimbrickDD, Jr. External validation of the Chicago Chiari Outcome Scale. JNeurosurg Pediatr 2014; 13: 679-84.
26. Pandey S, Li L, Wan RH, Gao L, Xu W, Cui DM. A retrospective studyon outcomes following posterior fossa decompression with duralsplitting surgery in patients with Chiari type I malformation. Clin NeurolNeurosurg 2020; 196: 106035.
27. Oral S, Yilmaz A, Kucuk A, Tumturk A, Menku A. Comparison of DuralSplitting and Duraplasty in Patients with Chiari Type I Malformation:Relationship between Tonsillo-Dural Distance and Syrinx Cavity. TurkNeurosurg 2019; 29: 229-36.
28. Erdogan E, Cansever T, Secer HI, et al. The evaluation of surgical treatment options in the Chiari Malformation Type I. Turk Neurosurg2010; 20: 303-13.
29. Romero FR, Pereira CA. Suboccipital craniectomy with or withoutduraplasty: what is the best choice in patients with Chiari type 1malformation? Arq Neuropsiquiatr 2010; 68: 623-6.
30. Chauvet D, Carpentier A, George B. Dura splitting decompression inChiari type 1 malformation: clinical experience and radiological findings.Neurosurg Rev 2009; 32: 465-70.
Volume 2, Issue 4, 2022
Page : 113-118
_Footer