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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 24:112-114, January 2003
© 2003 American Society of Neuroradiology

Case Report
BRAIN

Unusual Appearance of a Cisternal Hydatid Cyst

Zoran Rumboldt^a, Hrvoje Jednaak^b, Jasna Talan-Hranilovi^c, Tihana Rumboldt^a and Miljenko Kalousek^a

^a Department of Radiology, University Hospital "Sisters of Mercy," Zagreb, Croatia
^b Department of Neurosurgery, University Hospital "Sisters of Mercy," Zagreb, Croatia
^c Department of Pathology, University Hospital "Sisters of Mercy," Zagreb, Croatia

Address reprint requests to Zoran Rumboldt, Department of Radiology, University Hospital, "Sisters of Mercy," Vinogradska 29, Zagreb, 10000 HR, Croatia

Summary: We herein describe a case of an isolated multilocular hydatid cyst occurring in the basilar cisterns, with nondependent levels of different signal intensities shown on MR images. Three portions were visualized on T1-weighted images: the hyperintense inferior aspect, the isointense central part, and the superior aspect of lower signal intensity. The inferior portion was hypointense on T2-weighted images. This unusual appearance was caused by layering of hydatid sand and may represent a characteristic feature of hydatid disease.