Ultrastructural changes in liliequist membrane in hydrocephalic process and its implications for endoscopic third ventriculostomy procedure

Etüş, Volkan; Solakoğlu, Seyhun; Ceylan, Savaş

doi:10.5137/1019-5149.jtn.4171-11.0

Cited by 10 publications

(10 citation statements)

References 14 publications

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“…Liliequist membrane (LM) forms a complete division in the basal subarachnoid space [21]. Thus; LM fenestration has crucial importance for success of ETV [23]. LM is thicker and more resistant in patients with long-standing hydrocephalus when compared with LM in patients who have newly developed hydrocephaly.…”

Section: Liliequist Membrane Patency and Its Morphologymentioning

confidence: 99%

Evaluation of hydrocephalus patients with 3D-SPACE technique using variant FA mode at 3T

Algın

2017

Acta Neurol Belg

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The major advantages of three-dimensional sampling perfection with application optimized contrasts using different flip-angle evolution (3D-SPACE) technique are its high resistance to artifacts that occurs as a result of radiofrequency or static field, the ability of providing images with sub-millimeter voxel size which allows obtaining reformatted images in any plane due to isotropic three-dimensional data with lower specific absorption rate values. That is crucial during examination of cerebrospinal-fluid containing complex structures, and the acquisition time, which is approximately 5 min for scanning of entire cranium. Recent data revealed that T2-weighted (T2W) 3D-SPACE with variant flip-angle mode (VFAM) imaging allows fast and accurate evaluation of the hydrocephalus patients during both pre- and post-operative period for monitoring the treatment. For a better assessment of these patients; radiologists and neurosurgeons should be aware of the details and implications regarding to the 3D-SPACE technique, and they should follow the updates in this field. There could be a misconception about the difference between T2W-VFAM and routine heavily T2W 3D-SPACE images. T2W 3D-SPACE with VFAM imaging is only a subtype of 3D-SPACE technique. In this review, we described the details of T2W 3D-SPACE with VFAM imaging and comprehensively reviewed its recent applications.

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Section: Liliequist Membrane Patency and Its Morphologymentioning

confidence: 99%

Evaluation of hydrocephalus patients with 3D-SPACE technique using variant FA mode at 3T

Algın

2017

Acta Neurol Belg

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“…Endoscopic: Endoscopic surgeries are being increasingly used in brain (16,17,40,49,64), spine (60) and skull base lesions (2, 3, 7, 10). Microsurgical technique and the combination of endoscopic visual control offers an effective minimally invasive approach (8).…”

Section: Microscopic Transcortical Transforaminal Resectionmentioning

confidence: 99%

Management of colloid cyst of third ventricle

Yadav

Yadav²,

Parihar³

et al. 2014

Turkish Neurosurgery

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Colloid cysts are usually located in third ventricle and are believed to be derived from either primitive neuroepithelium or endoderm. Patients may remain asymptomatic for long time while some can present with paroxysmal headache, gait disturbance, nausea, vomiting, behavioral changes, weaknesses of lower limbs, impaired memory, new learning disability and sudden death. Computed tomography usually reveals a well-defined round or oval nonenhancing lesion. Although magnetic resonance imaging (MRI) signal intensity of colloid cysts is variable, the most common appearance is hyperintensity in T1-weighted sequences and iso to hypointensity in T2-weighted sequences. Observation, stereotactic aspiration, microscopic or endoscopic approaches and shunt surgery are various management options. Transcallosal and transcortical microscopic (with or without tubular retractor) approaches are mainly useful in normal-sized and dilated ventricles respectively. Endoscopic technique is an effective alternative to microsurgical technique but total resection and long-term recurrence remains a concern. Utilization of two instruments, the bi port technique and tubular retractor can be helpful in selected patients to overcome limitations. Although total excision should be aimed, subtotal excision and coagulation of residual cyst wall usually results in good long-term results without any growth of remnant wall. Conversion to an open procedure may be required in some patients.KEywords: Central nervous system cyst, Central nervous system neoplasm, Colloid cyst, Nervous system diseases, Third ventricle ÖZKolloid kistler genellikle üçüncü ventrikülde bulunur ve primitif nöroepitel veya endodermden köken aldıklarına inanılmaktadır. Hastalar uzun süre belirtisiz kalabilirler veya durum paroksismal baş ağrısı, yürüme bozukluğu, bulantı, kusma, davranış değişiklikleri, alt ekstremitelerde kuvvetsizlik, hafıza kaybı, yeni şeyler öğrenme zorluğu ve ani ölümle ortaya çıkabilir. Bilgisayarlı tomografi genellikle iyi tanımlanmış yuvarlak veya oval, kontrast tutmayan bir lezyon gösterir. Kolloid kistlerin manyetik rezonans görüntüleme (MRG) sinyal şiddeti değişkendir ama en sık rastlanan görünüm T1 ağırlıklı dizilerde hiperintens ve T2 ağırlıklı dizilerde izo ila hipointenstir. Gözlem, stereotaktik aspirasyon, mikroskopik veya endoskopik yaklaşımlar ve şant cerrahisi çeşitli tedavi seçenekleridir. Transkallosal ve transkortikal mikroskopik (tübüler retraktörle veya olmadan) yaklaşımlar temel olarak sırasıyla normal büyüklükte ve dilate ventriküllerde faydalıdır. Endoskopik teknik, mikrocerrahi tekniğe etkin bir alternatiftir ama total rezeksiyon imkanı ve uzun dönemde nüks olasılığı endişe yaratmaya devam etmektedir. İki alet kullanımı, iki portlu teknik ve tübüler retraktör bazı hastalarda sınırlamaları aşmak açısından faydalı olabilir. Total eksizyon hedeflenmelidir ama subtotal eksizyon ve kalan kist duvarının eksizyonu genellikle kalan duvarda bir büyüme olmadan uzun dönemli iyi sonuçlar verir. Bazı hastalarda açık cerrahiye dönmek de gerek...

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“…Findings of Oi [31] also showed that the duration of hydrocephalus might cause various intraventricular anomalies [31]. Etus [32] also found associated histological changes in the structure of LM. The author showed that in recent-onset hydrocephalus, LM assumes its usual membrane-like, arachnoidal structure.…”

Section: Endoscopic Third Ventriculostomy (Etv)mentioning

confidence: 88%

“…Etus [32] also advised against using lasers and hot coagulating probes during the fenestration, regardless of the maneuver used, due to possible accidental injury to the basilar artery or the oculomotor nerve.…”

Section: Endoscopic Third Ventriculostomy (Etv)mentioning

confidence: 99%