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Yıl:2024; Cilt: 61; Sayı: 2>> Özet
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Nöropsikiyatri Arşivi; 2024;61(2):101-106
Nörodejeneratif Ataksilerde ve Niemann Pick Tip C’deVideo-Okülografi Değerlendirmesi
Z Karaaslan, H A Hanağası, İ H Gurvit, B Bilgiç
İstanbul Üniversitesi, İstanbul
Amaç: Niemann-Pick Tip C’nin (NP-C) erken ve karakteristik bir bulgusu olan vertikal sakkadların yavaşlaması tanıya yardımcı olabilir. Bu çalışmadaki amacımız, videookülografinin (VOG), ataksi sendromlarının, özellikle NP-C’nin ayırıcı tanısındaki rolünü, bu tekniği ataksi hastalarının sakkadik hız ve yumuşak takip kazancının değerlendirilmesinde kullanarak ortaya koymaktı. Yöntem: Elli ataksi hastası ve hasta grubuyla yaş ve cinsiyet olarak eşleştirilmiş 50 sağlıklı kontrol çalışmaya dâhil edildi. Hastalardan ve sağlıklı deneklerden farklı açılar ve yönler için sakkadik göz hareketleri ve yumuşak takip göz hareketleri VOG kullanılarak kaydedildi. Bulgular: Hastaların sakkadik göz hareketleri hızı ve yumuşak takip kazanç değerleri, sağlıklı deneklerle karşılaştırıldığında tüm yönlerde ve tüm açılarda anlamlı derecede düşüktü. Hasta grubunda, 50 vakadan 3’ü, belirgin şekilde bozulmuş vertikal sakkad hızı ile, normale yakın ila hafif bozulmuş yatay sakkad ve nispeten sağlam yumuşak takip göz hareketleri izlenmesi nedeniyle şüpheli NP-C olarak seçildi; üç olguda da tanı genetik test ile doğrulandı ve bunun üzerine Miglustat tedavisi başlandı. Sonuç: Bulgularımız, dejeneratif ataksi hastalarında serebellar patolojinin hem bozulmuş sakkadik hız hem de yumuşak takip kazancı ile ilişkili olduğunu, NP-C’de, görece korunmuş olan diğer göz hareketlerinin aksine bozulmuş vertikal sakkadların tanısal bir belirteç olduğunu desteklemektedir. Göz hareketlerinin kaydedilmesinin kolay ve objektif bir yöntem olarak ataksi sendromlarının ayırıcı tanısında ve tedavi takibinde yararlı olabileceği sonucuna varılmıştır.
Video-Oculography Assessment in Neurodegenerative Ataxias andNiemann Pick Type C
Introduction: Deceleration of vertical saccades, an early and characteristic finding of Niemann-Pick Type C (NP-C), may help diagnosis. Our aim in this study was to demonstrate the role of video-oculography (VOG), in the differential diagnosis of ataxia syndromes, particularly of NP-C, using this technique in the evaluation of saccadic velocity and smooth pursuit gain of ataxia patients. Methods: We recruited consecutive 50 ataxia patients and 50 healthy control subjects who were age and sex-matched with the patient group. Saccadic eye movements and smooth pursuit eye movements for different angles and different directions from patients and healthy subjects were recorded by using VOG. Results: Saccadic eye movement velocity and smooth pursuit gain values of the patients were significantly lower in all directions and at all angles as compared to healthy subjects. In the patient group, 3 cases out of 50 were selected as suspected NP-C, based on the dissociation between their markedly impaired vertical saccadic velocity and near normal to slightly impaired horizontal one and relatively intact smooth pursuit eye movements; the diagnoses in all 3 cases were confirmed with positive genetic testing, and thereupon Miglustat treatment was started. Conclusion: Our findings support that cerebellar pathology in degenerative ataxia patients is associated with both impaired saccadic velocity and smooth pursuit gain, whereas in NP-C, only the impaired vertical saccades as opposed to relatively preserved other eye movements are seemingly a diagnostic marker for the entity. We conclude that recording of eye movements could be useful for differential diagnosis and monitorization of the treatment of ataxia syndromes as an easy and objective method.

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