Extraventricular choroid plexus papilloma in the brainstem

Choroid plexus papilloma (CPP) is extremely rare in the brainstem. The authors report the case of a 10-year-old boy with a lesion in the pons that was misdiagnosed as a glioma preoperatively. The boy underwent partial resection of the lesion, which was diagnosed as a CPP based on histopathological findings. The authors review the MRI findings in this case and conclude that the presence of a well-defined boundary and no obvious cerebral edema are valuable features for distinguishing brainstem CPP from glioma. Although previous reports of parenchymal CPPs have described enhancement on contrast-enhanced T1-weighted MR images, the lesion in this case did not demonstrate significant enhancement. The authors note that the diagnosis of extraventricular CPP cannot be ruled out in a case of brainstem tumor without marked enhancement.

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Unusual case of extradural choroid plexus papilloma of the sacral canal

Journal of Neurosurgery Spine ◽

10.3171/spi.2002.97.1.0102 ◽

2002 ◽

Vol 97 (1) ◽

pp. 102-105 ◽

Cited By ~ 8

Author(s):

Özlem Kurtkaya-Yapicier ◽

Bernd W. Scheithauer ◽

Karl Peter Van Peteghem ◽

John E. Sawicki

Keyword(s):

Mr Imaging ◽

Choroid Plexus ◽

Unusual Case ◽

Choroid Plexus Papilloma ◽

Cavum Septum Pellucidum ◽

Content Type ◽

Contrast Enhanced ◽

Resected Tumor ◽

Sacral Canal ◽

Plexus Papilloma

✓ An unusual case of a sacral, extradural choroid plexus papilloma involving the S1–3 level is described. This 50-year-old woman presented with a 4-month history of pain involving her right buttock, perineum, and leg. Contrast-enhanced magnetic resonance (MR) imaging of the spine revealed a well-defined, mildly enhancing sacral canal mass at the S1–3 level; its appearance was consistent with that of a benign tumor. Intraoperatively, the lesion was found to be extradural in location and was entwined among nerve roots in the sacral canal. Microscopic examination of the gross totally resected tumor revealed typical features of a choroid plexus papilloma. Despite performing a thorough neuroimaging workup (craniospinal contrast-enhanced MR imaging) for an intracranial or spinal primary mass, none was found. The choroid plexus appeared entirely normal; however, both a cavum septum pellucidum and a cavum vergae were noted. Extraneural choroid plexus papilloma, specifically intrasacral, extradural choroid plexus papilloma has not been previously reported. The present example is thought to have arisen either from ectopic choroid plexus tissue or perhaps by metaplasia from ependymal rests.

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Vestibular Syndrome Due to a Choroid Plexus Papilloma in a Ferret

Journal of the American Animal Hospital Association ◽

10.5326/0450097 ◽

2009 ◽

Vol 45 (2) ◽

pp. 97-101 ◽

Cited By ~ 13

Author(s):

Yvonne van Zeeland ◽

Nico Schoemaker ◽

Maartje Passon-Vastenburg ◽

Marja Kik

Keyword(s):

Choroid Plexus ◽

Choroid Plexus Papilloma ◽

Head Tilt ◽

Final Diagnosis ◽

Mustela Putorius ◽

Contrast Enhanced ◽

The Right ◽

Enhanced Computed Tomography ◽

Contrast Enhanced Computed Tomography ◽

Plexus Papilloma

A 6-year-old, castrated male ferret (Mustela putorius furo) was presented with progressive neurological signs consisting of a right-sided head tilt and ataxia. Neurological examination revealed hemiparesis and absence of proprioception on the right side, consistent with central vestibular syndrome. Measurement of blood glucose excluded hypoglycemia due to insulinoma. Contrast-enhanced computed tomography revealed the presence of an intracranial mass, consistent with either granuloma or neoplasia. Palliative treatment with prednisolone yielded no improvement. At postmortem examination, a final diagnosis of a choroid plexus papilloma originating from the fourth ventricle was made. This is the first report of such a tumor in a ferret.

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Primary choroid plexus papilloma of the sacral nerve roots

Journal of Neurosurgery Spine ◽

10.3171/2008.10.spi08277 ◽

2009 ◽

Vol 10 (1) ◽

pp. 51-53 ◽

Cited By ~ 8

Author(s):

Renzo Boldorini ◽

Gabriele Panzarasa ◽

Paola Girardi ◽

Guido Monga

Keyword(s):

Mr Imaging ◽

Choroid Plexus ◽

Choroid Plexus Papilloma ◽

Single Layer ◽

Complete Removal ◽

Nerve Roots ◽

Sacral Nerve ◽

Contrast Enhanced ◽

History Of ◽

Plexus Papilloma

The authors describe a unique case of a choroid plexus papilloma of the sacral nerve roots. This 60-year-old woman was admitted to the hospital because of a 1-year history of sacral pain, rectal and urinary bladder retention, and paradoxical episodic incontinence. Physical examination revealed sensory abnormalities in the S-2 dermatomes and poor rectal and bladder sphincter contractions. Contrast-enhanced spinal MR imaging showed a well-circumscribed, ovoid, homogeneously enhancing mass at the S1–2 level suggesting a diagnosis of ependymoma or schwannoma, and surgery allowed the identification and complete removal of a soft gray mass intimately adhering to the sacral nerve roots. Histological examination revealed a tumor consisting of papillary structures lined by a single layer of columnar cells, with an immunophenotype that satisfied the diagnostic criteria of choroid plexus papilloma. After diagnosis, contrast-enhanced brain MR imaging excluded the presence of a primary choroid plexus papilloma in the cerebral ventricles, thus ruling out a drop metastasis along the CSF pathways. A review of the literature did not reveal any similar cases of choroid plexus papilloma, and so the authors also discuss the inclusion of primary or metastatic papillary tumors in this unusual location as part of the differential diagnosis.

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Adult choroid plexus papilloma of the posterior fossa mimicking a hemangioblastoma

Journal of Neurosurgery ◽

10.3171/jns.2000.92.5.0870 ◽

2000 ◽

Vol 92 (5) ◽

pp. 870-872 ◽

Cited By ~ 21

Author(s):

Roberto García-Valtuille ◽

Faustino Abascal ◽

Ana I. García-Valtuille ◽

J. Ignacio Pinto ◽

Luis Cerezal ◽

...

Keyword(s):

Differential Diagnosis ◽

Magnetic Resonance ◽

Choroid Plexus ◽

Posterior Fossa ◽

Choroid Plexus Papilloma ◽

Mr Images ◽

Content Type ◽

Tomography Imaging ◽

Fine Print ◽

Plexus Papilloma

✓ The authors report a case of cystic choroid plexus papilloma that originated in the posterior fossa. No connection with the ventricular system was found intraoperatively. Magnetic resonance (MR) and computerized tomography imaging did not furnish a diagnosis, but findings of pathological examinations were consistent with those of choroid plexus papilloma. The authors describe the different appearances of the tumor on MR images and discuss the differential diagnosis with other tumors of the posterior fossa.

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