Ruptured intracranial dermoid cyst
Acute onset of severe headache.
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The patient had history of hydrocephalus and unerwent VP shunt
Complex right temporal intra axial lesion. In T1 it displays heterogenous intensity predominantly low signal in the center of the lesion with peripheral hyperintensity. In T2 the lesion is predominantly hyperintense in the center and periphery. The peripheral component becomes low signal in Fat suppressed T2. Scattered foci of hyperintense signal in T1 and FLAIR are seen dessiminated within the subarachnoid space.
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Diagnosis: Dermoid cyst after rupture
The dermoid cyst has ruptured and its fatty content become disseminated within the subarachnoid space resulting in T1/FLAIR hyperintense droplets. After evacuating its content, its center became hypointense on T1, and may resemble any other cystic lesions.
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- Ernemann U, Rieger J, Tatagiba M et-al. An MRI view of a ruptured dermoid cyst. Neurology. 2006;66 (2): 270. Neurology (full text) - doi:10.1212/01.wnl.0000195282.47210.42 - Pubmed citation
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