Posterior fossa dimension and volume estimates in pediatric patients with Chiari I malformations

Trigylidas, T.; Baronia, Benedicto C.; Vassilyadi, Michael; Ventureyra, Enrique C. G.

doi:10.1007/s00381-007-0432-4

Cited by 118 publications

(83 citation statements)

References 25 publications

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“…1,11,12,18,22,26,32,35,42 Children with CM-I have smaller posterior fossae than controls, 28,38,41,45 and in 1 study, patients with an associated syrinx had yet smaller posterior fossae than CM-I patients without a syrinx. 40 Syrinx has a strong association with scoliosis as well as motor and sensory symptoms.…”

Section: Discussionmentioning

confidence: 69%

Delayed resolution of syrinx after posterior fossa decompression without dural opening in children with Chiari malformation Type I

Kennedy¹,

Nelp²,

Kelly³

et al. 2015

PED

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OBJECT Chiari malformation Type I (CM-I) is associated with a syrinx in 25%–85% of patients. Although posterior fossa decompression (PFD) without dural opening is an accepted treatment option for children with symptomatic CM-I, many surgeons prefer to open the dura if a syrinx exists. The purpose of this study was to investigate the frequency and timing of syrinx resolution in children undergoing PFD without dural opening for CM-I. METHODS A retrospective review of 68 consecutive pediatric patients with CM-I and syringomyelia who underwent PFD without dural opening was conducted. Patient demographics, presenting symptoms and signs, radiographic findings, and intraoperative ultrasound and neuromonitoring findings were studied as well as the patients’ clinical and radiographic follow-up. RESULTS During the mean radiographic follow-up period of 32 months, 70% of the syringes improved. Syrinx improvement occurred at a mean of 31 months postoperatively. All patients experienced symptom improvement within the 1st year, despite only 26% of patients showing radiographic improvement during that period. Patients presenting with sensory symptoms or motor weakness had a higher likelihood of having radiographic syrinx improvement postoperatively. CONCLUSIONS In children with CM-I and a syrinx undergoing PFD without dural opening, syrinx resolution occurs in approximately 70% of patients. Radiographic improvement of the syrinx is delayed, but this does not correlate temporally with symptom improvement. Sensory symptoms or motor weakness on presentation are associated with syrinx resolution after surgery.

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Section: Discussionmentioning

confidence: 69%

Delayed resolution of syrinx after posterior fossa decompression without dural opening in children with Chiari malformation Type I

Kennedy¹,

Nelp²,

Kelly³

et al. 2015

PED

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“…Thin section images should be obtained to limit partial volume effects and allowing optimal visualization of small syrinx cavities. In human medicine, most of the investigations concerning SM have been carried out on T1WSE images 20, 21. Veterinary studies have used T2WSE images13, 22 and T1WSE images8, 14, 23 to evaluate SM.…”

Section: Discussionmentioning

confidence: 99%

Low‐Field Magnetic Resonance Imaging and Multislice Computed Tomography for the Detection of Cervical Syringomyelia in Dogs

Kromhout

Bree

Broeckx

et al. 2015

Veterinary Internal Medicne

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BackgroundSyringomyelia (SM) is defined as the presence of fluid‐containing cavities within the parenchyma of the spinal cord. Sagittal magnetic resonance (MR) images have been described as the preferred technique for visualizing SM in dogs and humans.ObjectiveTo investigate whether computed tomography (CT) can be used to diagnose SM.AnimalsThirty‐two client‐owned dogs referred for investigation of the cervical spine on magnetic resonance imaging (MRI) and CT.MethodsTwo reviewers retrospectively analyzed sagittal and transverse T1‐weighted spin echo (T1WSE) MR images and CT images from each dog for the presence of SM and, if SM was present, the width (mm, syrinx width [SW]) was measured. The results were analyzed statistically.ResultsFor the presence of SM there was a moderate interobserver agreement for MR (81%, κ = 0.54) and almost perfect agreement for CT (94%, κ = 0.87). There was a moderate intramodality agreement for both observers (observer 1 81%, κ = 0.59; observer 2 81%, κ = 0.57). For measurement of SW the repeatability was the best on the midsagittal T1WSE images (95% repeatability coefficient <0.52 mm) and the reproducibility was the best on midsagittal images in both modalities (95% limits of agreement −0.55–0.45; P = 0.002).Conclusion and Clinical ImportanceBoth techniques can be used to detect SM. Midsagittal MR and CT images are best used for measuring SW. Computed tomography can be used as a diagnostic tool for SM when MRI is not available, but CT cannot replace MRI as the standard screening technique for the detection of SM in Cavalier King Charles Spaniel for breeding purposes.

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“…fossa cranii posterior boyutu ile serebellar herniasyonun derecesi arasında ters bir ilişki olduğunu belirlemiştir. Literatürde CMT1'li hastalarda herniasyon gösteren tonsilla serebelli uzunluğunun foramen magnum'dan aşağıya doğru 3-29 mm arasında değiştiği bildirilmiştir (19,30,31 …”

Section: Ventrikül Hacminin Hesaplanmasıunclassified

Calculation of the Volume of Fourth Ventricle and the Length of Herniation Using the ImageJ Software in Patients with Chiari Type I malformation

Ertekın¹,

Acer²,

Vurdem³

et al. 2012

J Turgut Ozal Med Cent

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Amaç: Chiari malformasyonu tip 1 (CMT1), tonsilla serebelli'nin aşağıya, spinal kanala doğru herniyasyonu ile karakterize konjenital bir anomalidir. Bu çalışmanın amacı Chiari malformasyonu tip 1'li hastalarda ve kontrol grubunda ImageJ programı kullanarak 4. ventrikülün hacmini ve herniasyon gösteren tonsilla serebelli uzunluğunu belirlemektir. Gereç ve Yöntem: CMT1'li 27 hastanın manyetik rezonans (MR) görüntüleri retrospektif olarak incelendi (hasta grubu). Aynı zamanda baş ağrısı nedeniyle MR'ı çekilen, kranial ve intrakranial hiç bir patolojisi bulunmayan 18 kişi de kontrol grubu olarak incelendi. Hacim ve uzunluk değerleri ImageJ programı kullanılarak hesaplandı. Bulgular: 4. ventrikülün ortalama hacmi kontrol grubunda 1.08±0.20 cm 3 , hasta grubunda 1.01±0.27 cm 3 olarak belirlendi. İki gruptan elde edilen ventrikül hacimleri istatistiksel olarak farklı değildi (p>0.05). Hasta grubunda ortalama herniasyon uzunluğu 9.48±3.22 mm olarak bulundu. Her iki grupta da yaş ile diğer değişkenler (hacim ve uzunluk) arasında herhangi bir ilişki belirlenmedi (p>0.05). Sonuç: Bu çalışma 4. ventrikül hacminin ve herniasyon gösteren tonsilla serebelli uzunluğunun Image J programı ile ölçülebileceğini göstermiştir. Klinik bulgular ile korele edildiğinde bu ölçümlerin CMT1'li vakaların değerlendirmesine katkıda bulunacağını düşünmekteyiz. Anahtar Kelimeler: Arnold-Chiari Malformasyon; Manyetik Rezonans Görüntüleme; Dördüncü Ventrikül. Calculation of the Volume of Fourth Ventricle and the Length of Herniation Using the ImageJ Software in Patients with Chiari Type I malformationObjective: The Chiari type 1 malformation is a congenital anomaly which is characterized by downward displacement of the cerebellar tonsils into the cervical spinal canal. The aim of this study was to determine the volume of fourth ventricle and the length of herniated cerebellar tonsils in patients with Chiari type I malformation and control group using ImageJ program. Material and Methods: We retrospectively investigated magnetic resonance (MR) images from 27 patients with Chiari type I malformation (patient group). We also investigated MR images from 18 subjects as a control group who underwent an MRI complaining of headaches with the results showing no cranial or intracranial pathology. The volume and length were estimated using the ImageJ program Results: The mean volumes of fourth ventricle were determined as a 1.08±0.20 cm 3 and 1.01±0.27 cm 3 for control group and patient group, respectively. Ventricle volumes obtained from two groups were not statistically different (p>0.05). We found that the mean length of herniation was 9.48±3.22 mm in the patient group. We did not determine any relationship between age and any of these variables (volume and length) in both groups. Conclusion: This study has shown that the volume of fourth ventricle and the length of herniated cerebellar tonsils can be measured by ImageJ program. We think that when correlated with clinical findings, these measurements may contribute to the evaluation of Chiari type I malfo...

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Posterior fossa dimension and volume estimates in pediatric patients with Chiari I malformations

Cited by 118 publications

References 25 publications

Delayed resolution of syrinx after posterior fossa decompression without dural opening in children with Chiari malformation Type I

Delayed resolution of syrinx after posterior fossa decompression without dural opening in children with Chiari malformation Type I

Low‐Field Magnetic Resonance Imaging and Multislice Computed Tomography for the Detection of Cervical Syringomyelia in Dogs

Calculation of the Volume of Fourth Ventricle and the Length of Herniation Using the ImageJ Software in Patients with Chiari Type I malformation

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