Journal article

Radiologically atypical congenital posterior fossa dermoid cyst presenting late in life

David Wallace, Brian Tress, Pei Fun Kwan

JOURNAL OF CLINICAL NEUROSCIENCE | ELSEVIER SCI LTD | Published : 2008

Abstract

We report the case of a 74-year-old woman who presented with deterioration in gait, short-term memory loss and urinary incontinence. She had a past history of excision of a cervical dermal sinus tract at the age of 5 years. CT scan in 2004 revealed ventriculomegaly and an extremely hypodense ovoid structure lying in the midline low posterior fossa with calcification anteriorly. On MRI, the lesion was hypointense on T1-eighted and hyperintense on T2-weighted images, with incomplete suppression on fluid-attenuated inversion-recovery images and marked restriction on diffusion weighted images. Cerebrospinal fluid isotope study revealed non-communicating hydrocephalus. Posterior fossa crainectomy..

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University of Melbourne Researchers