İhsan DOĞAN, Ümit EROĞLU, Onur ÖZGÜRAL, Ağahan ÜNLÜ, Aylin HEPER OKÇU, Orkhan MAMMADKHANLI

İntrakraniyal Dermoid Tümörlerin Üç Nadir Yerleşim Yeri

İntrakraniyal dermoid tümörler ekstraserebral konjenial kistlerdir. Dermoid kistler intradural ve ekstradural olarak iki tipte incelenir. İntradural dermoid kistler intrakraniyal beyin-omurilik sıvısı boşluğundan köken alırlar. Ancak, kalvaryum kaynaklı ekstradural lezyonlar kistik hacim olarak yavaş büyürler, fakat bunun nedeni bilinmemektedir. Dermoid kistler yavaş büyüyen beyin tümörleri gibi davranırlar. Ayırıcı tanıda diğer kist ve kistik tümörler bulunur. Radyolojik olarak polikistik lezyonlara benzer, beyin translokasyonuna neden olan beyin omurilik sıvı alanlarında genişlemelerle ilişkilidir. Bilgisayar tomografi ve manyetik rezonans değerlendirmede, yüksek kolesterol içeren dermoidler serebrospinal sıvı karakteristiği gösterir. Bu çalışmada kalvarial kemik, temporal lob ve lateral ventrikül gibi dermoid lokalizasyonları için oldukça nadir olan santral sinir sistemi hastaları değerlendirilmiştir.

Three Rare Localizations of Intracranial Dermoid Tumors

Intracranial dermoid tumors are extracerebral congenital cysts. Dermoid cysts have two types as intradural and extradural. Intradural dermoid cystsare originated from the intracranial cerebrospinal fluid space. However, calvarium-originated extradural lesions increase in size with a slow growthin cyst volume, but the cause of active growth is unknown. Dermoid cysts act like slow-growing cerebral tumors. Differential diagnosis includesother cysts and cystic tumors. Their radiologic appearance looks like polycystic lesions which is associated with a wide expansion in the cerebrospinalfluid areas and cause brain translocation. In the cranial tomography and magnetic resonance imaging assessment, high-cholesterol-containingdermoids demonstrate cerebrospinal fluid characteristics. The present study based on the review of central nervous system patients with highly raredermoid localizations such as calvarial bone, temporal lobe and lateral ventricle.

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