Adult choroid plexus papilloma of the posterior fossa mimicking a hemangioblastoma

2000 ◽  
Vol 92 (5) ◽  
pp. 870-872 ◽  
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.

Intrinsic brainstem choroid plexus papilloma

2004 ◽  
Vol 100 (6) ◽  
pp. 1076-1078 ◽  
Author(s):  
Ashok Pillai ◽  
Kariyattil Rajeev ◽  
Sushil Chandi ◽  
Muthukuttiparambil Unnikrishnan
Keyword(s):  
Central Nervous System ◽  
Choroid Plexus ◽  
Choroid Plexus Papilloma ◽  
Residual Tumor ◽  
Brainstem Lesion ◽  
Content Type ◽  
The Central Nervous System ◽  
Choroid Plexus Papillomas ◽  
Fine Print ◽  
Plexus Papilloma

✓ The authors report an intrinsic brainstem lesion that was diagnosed initially as a pontine cavernoma, which finally proved to be a choroid plexus papilloma. Choroid plexus papillomas are rare tumors of the central nervous system and are usually intraventricular in location. The occurrence of this tumor in an intraparenchymal location is extremely rare, and its occurrence within the brainstem is previously unreported. The authors also report a trial of chemotherapy with lomustine in the management of the residual tumor.

Malignant choroid plexus papilloma with extraneural metastasis

1980 ◽  
Vol 52 (2) ◽  
pp. 251-255 ◽  
Author(s):  
Joao B. Valladares ◽  
Robert H. Perry ◽  
Ramanand M. Kalbag
Keyword(s):  
Survival Time ◽  
Choroid Plexus ◽  
Lateral Ventricle ◽  
Choroid Plexus Papilloma ◽  
Content Type ◽  
Long Survival ◽  
Extraneural Metastasis ◽  
Fine Print ◽  
Plexus Papilloma

✓ The authors describe and discuss a case of malignant choroid plexus papilloma originating in the lateral ventricle of an 11-month-old child. Unusual features include a long survival time of 9 years and the presence of an extraneural malignant deposit, probably metastatic in origin.

Diffuse craniospinal seeding from a benign fourth ventricle choroid plexus papilloma

1998 ◽  
Vol 88 (4) ◽  
pp. 757-760 ◽  
Author(s):  
Richard Leblanc ◽  
Sabah Bekhor ◽  
Denis Melanson ◽  
Stirling Carpenter
Keyword(s):  
Choroid Plexus ◽  
Fourth Ventricle ◽  
Obstructive Hydrocephalus ◽  
Choroid Plexus Papilloma ◽  
Blurred Vision ◽  
Content Type ◽  
Biological Potential ◽  
History Of ◽  
Fine Print ◽  
Plexus Papilloma

✓ Choroid plexus papillomas can metastasize to the subarachnoid space, but extensive metastasis has only been reported when the tumors are malignant. The authors report a case of diffuse, extensive metastasis to the craniospinal leptomeninges from a benign fourth ventricular choroid plexus papilloma in an adult. This 19-year-old woman presented with a 2-year history of headache, blurred vision, diplopia, and ataxia. Magnetic resonance imaging of the brain and spinal cord revealed obstructive hydrocephalus caused by a 4-cm, partially calcified, inhomogeneously enhancing tumor of the fourth ventricle that was displacing the pons, medulla oblongata, and cerebellum. Innumerable cystic lesions of varying size were also seen in the cranial and spinal leptomeninges. Histological examination of the resected fourth ventricular tumor and of a few of the leptomeningeal lesions revealed a benign choroid plexus papilloma and leptomeningeal choroid plexus cysts. This singular case of diffuse and extensive metastasis to the craniospinal leptomeninges from a histologically benign fourth ventricular papilloma adds to the available information about the biological potential of these tumors and expands the differential diagnosis of posterior fossa lesions with subarachnoid metastasis.

Radiation therapy of a choroid plexus papilloma of the cerebellopontine angle with bone involvement

1981 ◽  
Vol 54 (2) ◽  
pp. 245-247 ◽  
Author(s):  
Mahmoud G. Naguib ◽  
Shelley N. Chou ◽  
Angeline Mastri
Keyword(s):  
Radiation Therapy ◽  
Choroid Plexus ◽  
Cerebellopontine Angle ◽  
Choroid Plexus Papilloma ◽  
Bone Destruction ◽  
Bone Involvement ◽  
Content Type ◽  
Fine Print ◽  
Plexus Papilloma

✓ A case is reported of cerebellopontine angle choroid plexus papilloma with overlying bone destruction. Its favorable response to radiation therapy following subtotal excision is described.

Segmental myoclonus as the sole manifestation of a choroid plexus papilloma in the posterior fossa

2001 ◽  
Vol 95 (2) ◽  
pp. 338-340
Author(s):  
Elisabeth Chroni ◽  
Christos Paschalis ◽  
Dimitris Konstantinou ◽  
Theodoros Maraziotis ◽  
Michalis Bonas ◽  
...  
Keyword(s):  
Choroid Plexus ◽  
Posterior Fossa ◽  
Choroid Plexus Papilloma ◽  
Signs And Symptoms ◽  
Pathophysiological Mechanism ◽  
Increased Intracranial Pressure ◽  
Content Type ◽  
Cranial Nerve Palsies ◽  
Muscle Groups ◽  
Plexus Papilloma

✓ The authors describe the case of a 22-year-old woman with involuntary contractions of the sternocleidomastoid and trapezius muscles that resulted in turning movements of the head. The jerks displayed the clinical and neurophysiological characteristics of segmental myoclonus (SM) restricted to muscles supplied bilaterally by the first four cervical segments. Magnetic resonance imaging disclosed a tumor in the midline above the cisterna magna that was later histologically proven to be a choroid plexus papilloma. The patient's involuntary movements did not extend to other muscle groups or, in particular, to the palate, as one might have expected in the case of brainstem lesions. Myoclonus was the sole clinical manifestation of the tumor in this patient; other signs and symptoms invariably reported in other cases of posterior fossa papilloma, such as increased intracranial pressure or cranial nerve palsies, were absent. Release from suprasegmental control is suggested as a possible pathophysiological mechanism in this case of SM.

Accelerated spondylotic changes adjacent to the fused segment following central cervical corpectomy: magnetic resonance imaging study evidence

2004 ◽  
Vol 100 (1) ◽  
pp. 2-6 ◽  
Author(s):  
Vaijayantee Kulkarni ◽  
Vedantam Rajshekhar ◽  
Lakshminarayan Raghuram
Keyword(s):  
Magnetic Resonance ◽  
Mr Imaging ◽  
Imaging Study ◽  
Degenerative Changes ◽  
Adjacent Segment ◽  
Mr Images ◽  
Short Term ◽  
Content Type ◽  
Fine Print

Object. The authors studied whether cervical spine motion segments adjacent to a fused segment exhibit accelerated degenerative changes on short-term follow-up magnetic resonance (MR) imaging. Methods. Preoperative and short-term follow-up (mean duration 17.5 months, range 10–48 months) cervical MR images obtained in 44 patients who had undergone one- or two-level corpectomy for cervical spondylotic myelopathy were evaluated qualitatively and quantitatively. The motion segment adjacent to the fused segment and a segment remote from the fused segment were evaluated for indentation of the thecal sac, disc height, and sagittal functional diameter of the spinal canal on midsagittal T2-weighted MR images. Thecal sac indentations were classifed as mild, moderate, and severe. New indentations of the thecal sac of varying severity (mild in 17 patients [38.6%], moderate in 10 [22.7%], and severe in six [13.6%]) had developed at the adjacent segments in 33 (75%) of 44 patients. The degenerative changes were seen at the superior level in 11 patients, inferior level in 10 patients, and at both levels in 12 patients and resulted from both anterior and posterior element degeneration in the majority (23 [69.6%]) of patients. The remote segments showed mild thecal sac indentations in seven patients and moderate indentations in two patients (nine [20.5%] of 44). Compared with the changes at the remote segment, the canal size was significantly decreased at the superior adjacent segment by 0.9 mm (p = 0.007). No patient sustained a new neurological deficit due to adjacent-segment changes. Conclusions. On short-term follow-up MR imaging, levels adjacent to the fused segment exhibited more pronounced degenerative changes (compared with remote levels) in 75% of patients who had undergone one- or two-level central corpectomy.

Lack of agreement between direct magnetic resonance imaging and statistical determination of a subthalamic target: the role of electrophysiological guidance

2002 ◽  
Vol 97 (3) ◽  
pp. 591-597 ◽  
Author(s):  
Emmanuel Cuny ◽  
Dominique Guehl ◽  
Pierre Burbaud ◽  
Christian Gross ◽  
Vincent Dousset ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Mr Imaging ◽  
Functional Response ◽  
Anterior Commissure ◽  
Surgical Techniques ◽  
High Frequency Stimulation ◽  
Mr Images ◽  
Posterior Commissure ◽  
Content Type ◽  
Fine Print

Object. The goal of this study was to determine the most suitable procedure(s) to localize the optimal site for high-frequency stimulation of the subthalamic nucleus (STN) for the treatment of advanced Parkinson disease. Methods. Stereotactic coordinates of the STN were determined in 14 patients by using three different methods: direct identification of the STN on coronal and axial T2-weighted magnetic resonance (MR) images and indirect targeting in which the STN coordinates are referred to the anterior commissure—posterior commissure (AC—PC) line, which, itself, is determined either by using stereotactic ventriculography or reconstruction from three-dimensional (3D) MR images. During the surgical procedure, electrode implantation was guided by single-unit microrecordings on multiple parallel trajectories and by clinical assessment of stimulations. The site where the optimal functional response was obtained was considered to be the best target. Computerized tomography scanning was performed 3 days later and the scans were combined with preoperative 3D MR images to transfer the position of the best target to the same system of stereotactic coordinates. An algorithm was designed to convert individual stereotactic coordinates into an all-purpose PC-referenced system for comparing the respective accuracy of each method of targeting, according to the position of the best target. Conclusions. The target that is directly identified by MR imaging is more remote (mainly in the lateral axis) from the site of the optimal functional response than targets obtained using other procedures, and the variability of this method in the lateral and superoinferior axes is greater. In contrast, the target defined by 3D MR imaging is closest to the target of optimal functional response and the variability of this method is the least great. Thus, 3D reconstruction adjusted to the AC—PC line is the most accurate technique for STN targeting, whereas direct visualization of the STN on MR images is the least effective. Electrophysiological guidance makes it possible to correct the inherent inaccuracy of the imaging and surgical techniques and is not designed to modify the initial targeting.

Choroid plexus papilloma: Magnetic resonance, computed tomography, and angiographic observations

1987 ◽  
Vol 27 (5) ◽  
pp. 466-468 ◽  
Author(s):  
V. Wagle ◽  
D. Melanson ◽  
R. Ethier ◽  
G. Bertrand ◽  
J.G. Villemure
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Choroid Plexus ◽  
Choroid Plexus Papilloma ◽  
Plexus Papilloma

Third ventricular choroid plexus papilloma with psychosis

1997 ◽  
Vol 87 (1) ◽  
pp. 103-105 ◽  
Author(s):  
Benjamin S. Carson ◽  
Jon D. Weingart ◽  
Michael Guarnieri ◽  
Paul G. Fisher
Keyword(s):  
Choroid Plexus ◽  
Behavioral Problems ◽  
Third Ventricle ◽  
Choroid Plexus Papilloma ◽  
Pathological Examination ◽  
Psychiatric Evaluation ◽  
Content Type ◽  
Resected Tumor ◽  
History Of ◽  
Plexus Papilloma

✓ This 9-year-old boy with a history of behavioral problems and worsening psychosis responded initially to treatment with haloperidol. However, a magnetic resonance image obtained as part of his psychiatric evaluation revealed an anterior third ventricle tumor and mild-to-moderate hydrocephalus. The resected tumor was found on pathological examination to be a choroid plexus papilloma. The patient had an uneventful postoperative course and remained free of psychosis or mood disorder at 1-year follow-up examination.

Extraventricular choroid plexus papilloma in the brainstem

2013 ◽  
Vol 12 (3) ◽  
pp. 247-250 ◽  
Author(s):  
Anqi Xiao ◽  
Jianguo Xu ◽  
Xin He ◽  
Chao You
Keyword(s):  
Choroid Plexus ◽  
Cerebral Edema ◽  
Choroid Plexus Papilloma ◽  
Significant Enhancement ◽  
Mr Images ◽  
Mri Findings ◽  
Brainstem Tumor ◽  
Contrast Enhanced ◽  
Marked Enhancement ◽  
Plexus Papilloma

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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