title: Isolated fourth ventricular cysticercus cyst: MR imaging in 4 cases with short literature review.
abstract: We describe the magnetic resonance imaging (MRI) signal characteristics of isolated (solitary lesion) intra fourth ventricular cysticercus cyst in 4 patients who clinically presented with obstructive hydrocephalus. All patients had routine MRI sequences (T1, T2, & proton density-weighted imaging), Fluid Attenuation Inversion Recovery (FLAIR), and post-gadolinium imaging followed by cerebrospinal fluid (CSF) flow study. It revealed a CSF signal intensity (on all pulse sequences), intra fourth ventricular cyst with a nidus (scolex), and wall enhancement. On T1-weighted and FLAIR images, the cyst wall and nidus (scolex) were seen in 3 cases, which were not seen in other routine sequences. The CSF flow study showed the intraluminal nature of the cyst. The MRI features suspected a cysticercus cyst, and per-operative findings and histopathological examination confirmed the diagnosis. The review of literature of the intra fourth ventricular cyst is briefly discussed.
authors.affiliation: Department of Radiodiagnosis and Imaging, Christian Medical College and Hospital, Vellore - 632004, Tamil Nadu, India. singhsurendra26@hotmail.com
authors.forename: S
authors.initials: S
authors.lastname: Singh
authors.forename: S V
authors.initials: SV
authors.lastname: Gibikote
authors.forename: N K
authors.initials: NK
authors.lastname: Shyamkumar
mesh_terms: D000328:Adult; D000818:Animals; D003552:Cysticercus; D005260:Female; D020546:Fourth Ventricle / Q000469:parasitology* / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D020019:Neurocysticercosis / Q000473:pathology*