Three Rare Localizations of Intracranial Dermoid Tumors

Abstract

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

Keywords

• Dermoid Tumor
• Cyst
• Atypic
• Extradural-Intradural Lesion

İntrakraniyal Dermoid Tümörlerin Üç Nadir Yerleşim Yeri

Abstract

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.

Keywords

• Dermoid Tümör
• Kist
• Atipik
• Ekstradural-İntradural Lezyon

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