An epithelial cyst in the cerebellopontine angle

1991 ◽  
Vol 74 (2) ◽  
pp. 278-282 ◽  
Author(s):  
Suet Yi Leung ◽  
Thomas H. K. Ng ◽  
C. F. Fung ◽  
Y. W. Fan
Keyword(s):  
Cerebellopontine Angle ◽  
Posterior Cranial Fossa ◽  
Epithelial Cyst ◽  
Electron Microscopic ◽  
Content Type ◽  
Epithelial Cysts ◽  
Microscopic Studies ◽  
The Central Nervous System ◽  
Cranial Fossa ◽  
Endodermal Origin

✓ A case of a benign epithelial cyst in the posterior cranial fossa is described. It had the unique histological feature of a double-layered cuboidal epithelial lining. Detailed immunohistochemical and electron microscopic studies supported an endodermal origin. The differential diagnosis and the histogenesis of epithelial cysts in the central nervous System are discussed.

Symptomatic neuroepithelial cysts in the posterior cranial fossa immunohistochemical and electron-microscopic studies

1988 ◽  
Vol 30 (4) ◽  
pp. 298-304 ◽  
Author(s):  
Samruay Shuangshoti ◽  
Nareelak Pitakdamrongwong ◽  
Boonsom Poneprasert ◽  
Damrong Bhavilai ◽  
Vira Kasantikul
Keyword(s):  
Posterior Cranial Fossa ◽  
Electron Microscopic ◽  
Microscopic Studies ◽  
Cranial Fossa ◽  
Neuroepithelial Cysts

Acute subdural hematoma and death following lateral cervical spinal puncture

1983 ◽  
Vol 58 (2) ◽  
pp. 284-286 ◽  
Author(s):  
Larry A. Rogers
Keyword(s):  
Vertebral Artery ◽  
Subdural Hematoma ◽  
Posterior Cranial Fossa ◽  
Acute Subdural Hematoma ◽  
Content Type ◽  
Spinal Puncture ◽  
Cranial Fossa ◽  
Fine Print

✓ An acute subdural hematoma dissecting into the posterior cranial fossa and resulting in death is reported. The patient had undergone spinal puncture by the lateral cervical technique prior to development of the hematoma. Autopsy demonstrated that the source of hemorrhage was an anomalous intraspinal vertebral artery.

Subclassification of Anencephalic Human Fetuses According to Morphology of the Posterior Cranial Fossa

2004 ◽  
Vol 7 (6) ◽  
pp. 601-606 ◽  
Author(s):  
Jens Fog Lomholt ◽  
Birgit Fischer-Hansen ◽  
Jean W. Keeling ◽  
Ingermarie Reintoft ◽  
Inger Kjær
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Posterior Cranial Fossa ◽  
Cranial Morphology ◽  
Bony Tissue ◽  
Cranial Development ◽  
Future Assessment ◽  
The Central Nervous System ◽  
Cranial Fossa ◽  
Base Of The Skull

Anencephaly is a designation for congenital absence of the cranial vault with cerebral hemispheres completely missing or decreased to small masses attached to the base of the skull. The etiology is unknown. Whether the bony tissue or soft brain tissue is a primary factor is also unknown. The present study has focused on the posterior cranial fossa in anencephaly. The goal is to determine whether differences in the posterior cranial fossa could provide a basis for subclassification of anencephalic fetal skeletons. Twenty-three human anencephalic fetuses, at gestational ages 13 to 22 weeks, were studied. Radiologic and cephalometric analyses, including measurements of bone sizes and different angles, were performed. Permission for autopsy of the central nervous system was not available. For comparison of anencephalic findings with normal conditions, standards from a recent publication were used. Foot length served as a parameter for age comparison. The study showed 2 morphologic types of the posterior cranial fossa. One type had a fossa cranial morphology close to normal morphology, whereas the other had a malformed and much smaller posterior cranial fossa. The latter condition was presumed to be due to a primary error in chondral and cranial development. The current skeletal subgrouping might be essential for clinicians' or pathologists' future assessment of the autopsy results. The skeletal subgrouping should, if possible, be associated with karyotyping and analysis of the central nervous system. The goal is to distinguish between congenital conditions resulting in anencephaly and acquired conditions resulting in anencephaly.

Pineoblastoma with an unusually long survival

1988 ◽  
Vol 69 (2) ◽  
pp. 287-291 ◽  
Author(s):  
Yuji Uematsu ◽  
Toru Itakura ◽  
Seiji Hayashi ◽  
Norihiko Komai
Keyword(s):  
Cell Differentiation ◽  
Electron Microscopic ◽  
Content Type ◽  
Long Survival ◽  
Microscopic Studies ◽  
Stereotaxic Biopsy ◽  
Autopsy Specimens ◽  
Shunting Procedure ◽  
Fine Print

✓ The authors report a case of pineoblastoma with a 9-year follow-up period after stereotaxic biopsy, a shunting procedure, and radiotherapy. Light and electron microscopic studies of biopsy and autopsy specimens revealed no cell differentiation of the pineoblastoma. The possible factors predisposing to long survival are discussed in comparison with the course in patients with medulloblastoma.

The straight sinus

1974 ◽  
Vol 41 (6) ◽  
pp. 724-727 ◽  
Author(s):  
R. C. Saxena ◽  
M. A. Q. Beg ◽  
A. C. Das
Keyword(s):  
Dura Mater ◽  
Posterior Cranial Fossa ◽  
Cerebral Vein ◽  
Content Type ◽  
Straight Sinus ◽  
Sagittal Sinus ◽  
India Ink ◽  
Human Cadavers ◽  
Cranial Fossa ◽  
Fine Print

✓ The dura mater of the posterior cranial fossa of 86 adult human cadavers has been examined grossly after the injection of India ink through the confluence of sinuses in order to visualize the extent, communications, and tributaries of the straight sinus. Variations from the textbook description of formation by the union of the inferior sagittal sinus and the great cerebral vein are described and discussed.

Patterns for Differentiation of Posterior Fossa Neoplasms as Detected by Brain Scans

1970 ◽  
Vol 09 (04) ◽  
pp. 303-316
Author(s):  
Frank DeLand ◽  
A. EveretteJames ◽  
Henry Wagner
Keyword(s):  
Skull Base ◽  
Posterior Fossa ◽  
Cerebellopontine Angle ◽  
Lateral View ◽  
Posterior Cranial Fossa ◽  
Anatomical Location ◽  
Posterior View ◽  
Brain Scans ◽  
Histological Characteristics ◽  
Cranial Fossa

SummaryThe histological characteristics of neoplasms that occur in the posterior cranial fossa can often be predicted by a knowledge of the patient’s age and the specific anatomical location of the tumor. Dividing the posterior fossa into midline, cerebellar fossa and cerebellopontine angle provides a scheme to characterize abnormal accumulations of radioactivity according to their anatomical locations. Midline lesions arise from bases activity on the lateral view and are in the midline on the posterior view. Lesions of the cerebellar fossa may be adjacent to but do not appear to arise from the basal structures and are not in the midline. Cerebellopontine angle tumors are adjacent to and appear to arise from the normal radioactivity at the skull base but lie lateral to the midline. The expected distribution of histological types of neoplasms in each area according to age are discussed.

Effect of intrathecal thrombolytic therapy on subarachnoid clot and chronic vasospasm in a primate model of SAH

1988 ◽  
Vol 69 (5) ◽  
pp. 723-735 ◽  
Author(s):  
Jay Max Findlay ◽  
Bryce K. A. Weir ◽  
David Steinke ◽  
Takamura Tanabe ◽  
Philip Gordon ◽  
...  
Keyword(s):  
Placebo Group ◽  
Controlled Trial ◽  
Cerebral Arteries ◽  
Brain Inflammation ◽  
Tissue Type ◽  
Electron Microscopic ◽  
Primate Model ◽  
Content Type ◽  
Microscopic Studies ◽  
Chronic Vasospasm

✓ The safety and efficacy of the thrombolytic agent tissue-type plasminogen activator (tPA) in the elimination of subarachnoid clot and prevention of chronic vasospasm were evaluated in a blind randomized placebo-controlled trial. Twenty-four monkeys were randomly assigned to one of two groups of 12. Each group underwent baseline cerebral angiography and coagulation analysis followed by right-sided craniectomy and experimental subarachnoid hemorrhage (SAH). An Ommaya reservoir was inserted with its catheter placed into the subarachnoid space. Twenty-four hours later one group (the tPA group) received 0.5 mg of tPA in 0.5 ml of buffer injected into the reservoir every 8 hours for three doses, while the second group (the placebo group) received the same volume of normal saline. On Day 7, angiography was repeated and the animals were sacrificed. One animal from the placebo group developed a delayed ischemic neurological deficit on Day 5 after SAH. Moderate to severe vasospasm (> 30% reduction in vessel caliber) was present on Day 7 in the internal carotid and middle cerebral arteries of the animals in the placebo group (p < 0.01), while in the tPA group only mild narrowing of the anterior cerebral artery was seen. No significant change in coagulation status occurred in either group. All animals in the placebo group had a large amount of subarachnoid clot remaining at the time of sacrifice, but 11 of the 12 animals in the tPA group were completely free of clot. The results of electron microscopic studies of the cerebral arteries correlated with angiography, and there was no histological evidence of brain inflammation associated with the intrathecal use of tPA.

4. Electron Microscopic Studies on the Central Nervous System

1962 ◽  
Vol 4 (0) ◽  
pp. 146-146
Author(s):  
P. H. HASHIMOTO ◽  
T. MAEDA ◽  
S. MORI ◽  
N. SHIMIZU
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Electron Microscopic ◽  
Microscopic Studies ◽  
The Central Nervous System

Posterior atlantooccipital membrane for duraplasty

2002 ◽  
Vol 97 (2) ◽  
pp. 266-268 ◽  
Author(s):  
R. Shane Tubbs ◽  
John C. Wellons ◽  
Jeffrey P. Blount ◽  
W. Jerry Oakes
Keyword(s):  
Foreign Body ◽  
Postoperative Complications ◽  
Pediatric Patients ◽  
Chiari I Malformation ◽  
Posterior Cranial Fossa ◽  
Content Type ◽  
Chiari I ◽  
Cranial Fossa ◽  
Fine Print

✓ The authors describe the use of autogenetic posterior atlantooccipital (PAO) membrane for duraplasty following after posterior cranial fossa surgery. The PAO membrane is routinely exposed for procedures of the posterior cranial fossa and merely needs to be dissected free of the underlying dura mater. Recently this membrane was obtained in several pediatric patients following procedures of the posterior cranial fossa such as duraplasty in case of Chiari I malformation. No postoperative complications were found at 6-month follow-up examination. The advantages of this intervention include less manipulation of muscle and fascia than that involved in other procedures and, therefore, seemingly less postoperative pain and the negation of issues inherent with foreign-body graft sources. The authors believe this structure to be of use as a dural substitute in small dural openings of the posterior cranial fossa.

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