Typical Findings With Computerized Tomography in Tumors of the Posterior Fossa

1978 ◽  
pp. 159-165 ◽  
Author(s):  
T. Grumme ◽  
A. Aulich ◽  
E. Kazner ◽  
K. Kretschmar ◽  
W. Lanksch ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa

Lead encephalopathy presenting as a posterior fossa mass

1986 ◽  
Vol 65 (5) ◽  
pp. 713-715 ◽  
Author(s):  
J. Frederick Harrington ◽  
Timothy B. Mapstone ◽  
Warren R. Selman ◽  
Pamela Galloway ◽  
Carl Bundschuh
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Content Type ◽  
Lead Encephalopathy ◽  
Fine Print

✓ A case of lead encephalopathy with clinical and computerized tomography evidence of a midline posterior fossa mass is presented. The pathophysiology and the predilection for posterior fossa involvement are discussed.

Diagnostic value of 201Tl—single-photon emission computerized tomography studies in cases of posterior fossa hemangioblastomas

2001 ◽  
Vol 95 (2) ◽  
pp. 292-297 ◽  
Author(s):  
Takeo Kondo ◽  
Toshihiro Kumabe ◽  
Shin Maruoka ◽  
Takashi Yoshimoto
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Single Photon ◽  
Photon Emission ◽  
Magnetic Resonance Images ◽  
Thallium 201 ◽  
Homologous Region ◽  
Single Photon Emission ◽  
Content Type ◽  
Fine Print

Object. The 201Tl uptake index was evaluated for its usefulness in formulating a diagnosis of hemangioblastoma. Thallium-201—single-photon emission computerized tomography (SPECT) studies were performed in nine patients harboring hemangioblastomas in the posterior fossa and in five patients (six lesions) with gliomas in the posterior fossa. Methods. The 201Tl uptake index was defined as the ratio of mean counts of isotope per pixel in the tumor to mean counts of isotope per pixel in the homologous region of the healthy brain. The 201Tl uptake indices of the early image (TlE) and that of the delayed image (TlD) were calculated. The isotope retention index (RI) was calculated as (TlE − TlD)/TlE. The TlE was 2.7 ± 0.7 in hemangioblastomas and 2.9 ± 1.7 in gliomas (mean ± standard deviation). The TlD was 1.5 ± 0.4 in hemangioblastomas and 2.4 ± 1.6 in gliomas. There were no significant differences between hemangioblastomas and gliomas when TlEs and TlDs were compared. The isotope RI was 0.43 ± 0.07 in hemangioblastomas and 0.15 ± 0.1 in gliomas, showing a significantly higher RI in hemangioblastomas compared with gliomas (p < 0.01). Conclusions. Thallium-201 washout is significantly faster in hemangioblastomas. Hemangioblastoma is biologically benign, but contains a rich capillary network that forms a hypervascular tumor bed. Variations in its appearance on magnetic resonance images may cause difficulties in the differential diagnosis of hemangioblastoma. Thallium-201 SPECT studies can be used to distinguish hemangioblastomas from gliomas in the posterior fossa.

Posterior fossa hemorrhage. Localization by computerized tomography

JAMA ◽  
1975 ◽  
Vol 232 (9) ◽  
pp. 932-933 ◽  
Author(s):  
B. D. Pressman
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa

Follow-up Studies in the Posterior Fossa in Children using Computerized Tomography

1981 ◽  
Vol 24 (01) ◽  
pp. 2-5
Author(s):  
W. Bock ◽  
H.-E. Clar ◽  
H. Weichert ◽  
L. Gerhard
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Follow Up Studies

Anatomic Specificity of Central Vestibular Signs in Posterior Fossa Lesions

1982 ◽  
Vol 91 (5) ◽  
pp. 510-515 ◽  
Author(s):  
Arvind Kumar ◽  
Mahmood Mafee ◽  
Nicholas Torok
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
The Other

The reliability of central vestibular signs such as decruitment in signifying retrolabyrinthine lesions has been well established. This study was initiated to determine if this and other central vestibular signs, individually or collectively, indicate involvement of specific anatomic structures in the posterior fossa. Forty-six patients with morphologic lesions defined by computerized tomography (CT), pneumo-CT or autopsy were studied. Oculomotor signs showed a statistically significant correlation with lesions of the archicerebellum. The other central vestibular signs did not show any correlations.

Spinal intramedullary spread of medulloblastoma

1986 ◽  
Vol 65 (2) ◽  
pp. 253-255 ◽  
Author(s):  
Stanley L. Barnwell ◽  
Michael S. B. Edwards
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Computerized Tomography ◽  
Posterior Fossa ◽  
Diagnostic Information ◽  
Resonance Imaging ◽  
Content Type ◽  
Fine Print

✓ The case of an 11-year-old boy is reported in whom two intramedullary lesions developed at the thoracic-cervical and thoracic-lumbar junctions 2½ years after resection and irradiation of a medulloblastoma in the posterior fossa. There was no evidence of subarachnoid spread of the tumor. Magnetic resonance imaging was used to localize these lesions, and provided much better diagnostic information than either computerized tomography scans or myelograms.

scholarly journals An Indirect Computerized Tomography Sign of Chronic Subdural Hematoma demonstrated in the Posterior Fossa

1985 ◽  
Vol 25 (3) ◽  
pp. 187-194
Author(s):  
Takao MACHI ◽  
Ryutaro MAEYAMA ◽  
Tosuke TAKAKI ◽  
Shogo YOSHIURA ◽  
Itsuma KAMOI ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Subdural Hematoma ◽  
Chronic Subdural Hematoma

Posterior fossa xanthogranuloma

1979 ◽  
Vol 51 (5) ◽  
pp. 718-722 ◽  
Author(s):  
Jesús Vaquero ◽  
Guillermo Leunda ◽  
José M. Cabezudo ◽  
Manuel de Juan ◽  
José Herrero ◽  
...  
Keyword(s):  
Choroid Plexus ◽  
Computerized Tomography ◽  
Posterior Fossa ◽  
Lateral Ventricle ◽  
Content Type ◽  
Similar Density ◽  
The Right ◽  
Fine Print

✓ A large subdural xanthogranuloma was removed from the posterior fossa of a 53-year-old woman with symptoms of Hand-Schüller-Christian disease. Two additional masses with similar density on computerized tomography were found in the hypothalamus and in the choroid plexus of the right lateral ventricle.

Infantile chronic subdural hematoma of the posterior fossa diagnosed by computerized tomography

1977 ◽  
Vol 47 (6) ◽  
pp. 949-952 ◽  
Author(s):  
Barry N. French ◽  
Arthur B. Dublin
Keyword(s):  
White Matter ◽  
Brain Stem ◽  
Computerized Tomography ◽  
Posterior Fossa ◽  
Subdural Hematoma ◽  
Chronic Subdural Hematoma ◽  
Cerebral White Matter ◽  
Hounsfield Units ◽  
Content Type ◽  
The Brain

✓ A 9-week-old infant manifested continuous vomiting for 1 week accompanied by a tense fontanel, “sun setting” of the eyes, frequent opisthotonos, and hypertonicity. The head circumference was at the 50th percentile. Computerized tomography (CT) revealed acute hydrocephalus and a posterior fossa subdural hematoma. The brain stem and cerebellum were of greater density (54 Hounsfield units) than normal cerebral white matter (42 Hounsfield units) whereas the subdural hematoma was the same density as normal cerebral white matter (“isodense”). The cerebellum and brain stem became enhanced by contrast (68 Hounsfield units), but no enhancement occurred in the cerebral white matter or subdural hematoma. A shunt followed by occipital craniectomy resolved both the hydrocephalus and subdural hematoma. Repeat CT scan 15 days postoperatively disclosed continuing higher density of the cerebellum and brain stem (60 Hounsfield units) relative to cerebral white matter. Increased density of the infantile cerebellum has been noted previously but not to the same extent as in this patient.

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