Epithelial cyst of the fourth ventricle

1990 ◽  
Vol 73 (6) ◽  
pp. 942-945 ◽  
Author(s):  
Kenshi Yoshida ◽  
Saburo Nakamura ◽  
Takashi Tsubokawa ◽  
Jun Sasaki ◽  
Tadashi Shibuya
Keyword(s):  
Basement Membrane ◽  
Cyst Wall ◽  
Fourth Ventricle ◽  
Epithelial Layer ◽  
Epithelial Cyst ◽  
Histological Findings ◽  
Content Type ◽  
Ultrastructural Studies ◽  
Endodermal Origin ◽  
Fine Print

✓ A case of epithelial cyst in the fourth ventricle of a 4-year-old child is described. A single epithelial layer with a clear basement membrane lining the cyst wall was observed. There were no prominent histological findings to suggest a pathogenesis for this cyst based on immunohistochemical or ultrastructural studies; however, the cyst fluid contained significant amounts of carcinoembryonic antigen. It is considered that the epithelial layer lining the cyst wall was possibly of endodermal origin.

Choroidal epithelial cyst

1977 ◽  
Vol 47 (6) ◽  
pp. 955-960 ◽  
Author(s):  
Atsuo Koto ◽  
Dikran S. Horoupian ◽  
Kenneth Shulman
Keyword(s):  
Cerebrospinal Fluid ◽  
Electron Microscope ◽  
Epithelial Cells ◽  
Basement Membrane ◽  
Single Layer ◽  
Epithelial Cyst ◽  
Content Type ◽  
Choroidal Epithelium ◽  
Surgical Extirpation ◽  
Fine Print

✓ A supratentorial cyst in the leptomeninges of an 8-month-old infant was studied with the electron microscope. The lining of the cyst consisted of a single layer of pegshaped epithelial cells rich in organelles and glycogen. Their free border had numerous microvilli but no cilia, and their basal portions rested on a basement membrane. Tight junctions and interdigitations were frequent between contiguous cells. The blood vessels were fenestrated. Since these features characterize developing choroidal epithelial cells, we felt the diagnosis of choroidal epithelial cyst was justified. Cysts lined by choroidal epithelium may continue to secrete cerebrospinal fluid after surgical extirpation when this is incomplete. Accumulation of the fluid in the partially excised cyst bed may therefore account for recurrence of symptoms.

Fine structure of an intracerebral epithelial cyst

1974 ◽  
Vol 41 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Nitya R. Ghatak ◽  
Asao Hirano ◽  
Samuel S. Kasoff ◽  
H. M. Zimmerman
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Basement Membrane ◽  
Single Layer ◽  
Cellular Transport ◽  
Epithelial Cyst ◽  
Choroid Plexus Epithelium ◽  
Content Type ◽  
Pinocytotic Vesicles ◽  
Fine Print

✓ The wall of an intracerebral extraventricular cyst was studied with the electron microscope. The lining of the cyst consisted of a single layer of nonciliated, flattened or cuboidal epithelium similar to that in an ependyma. Unlike the ventricular ependyma, the lining cells of the cyst were bordered by a continuous basement membrane abutting on the leptomeninges or on the compressed brain tissue and thus shared some morphological similarities with the choroid plexus epithelium. Although pathogenesis of the cyst remains obscure, the fine structure of the lining cells is suggestive of their neuroepithelial origin. The occurrence of abundant pinocytotic vesicles in these cells further suggests the possibility of cellular transport of fluid to account for the continued expansion of the cyst.

Enterogenous cyst of the fourth ventricle

1981 ◽  
Vol 54 (6) ◽  
pp. 836-838 ◽  
Author(s):  
Farhad Afshar ◽  
Carl L. Scholtz
Keyword(s):  
Spinal Cord ◽  
Cyst Wall ◽  
Fourth Ventricle ◽  
Third Ventricle ◽  
Enterogenous Cyst ◽  
Content Type ◽  
The Third ◽  
Colloid Cysts ◽  
The Relationship ◽  
Fine Print

✓ A case of a benign cyst within the fourth ventricle is described. The histology of the cyst wall lining resembled that of an enterogenous cyst of the spinal cord. The relationship between this cyst, colloid cysts of the third ventricle, and enterogenous cysts of the spinal cord is discussed.

Unusual causes of trigeminal neuralgia treated by gamma knife radiosurgery

2002 ◽  
Vol 97 ◽  
pp. 533-535 ◽  
Author(s):  
Jin Woo Chang ◽  
Jae Young Choi ◽  
Young Sul Yoon ◽  
Yong Gou Park ◽  
Sang Sup Chung
Keyword(s):  
Trigeminal Neuralgia ◽  
Gamma Knife ◽  
Fourth Ventricle ◽  
Gamma Knife Radiosurgery ◽  
Brain Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Segmental Demyelination ◽  
Content Type ◽  
Clinical Responses ◽  
Fine Print

✓ The purpose of this paper was to present two cases of secondary trigeminal neuralgia (TN) with an unusual origin and lesion location. In two cases TN was caused by lesions along the course of the trigeminal nerve within the pons and adjacent to the fourth ventricle. Both cases presented with typical TN. Brain magnetic resonance imaging revealed linear or wedge-shaped lesions adjacent to the fourth ventricle, extending anterolaterally and lying along the pathway of the intraaxial trigeminal fibers. The involvement of the nucleus of the spinal trigeminal tract and of the principal sensory trigeminal nucleus with segmental demyelination are suggested as possible causes for trigeminal pain in these cases. It is postulated that these lesions are the result of an old viral neuritis. The patients underwent gamma knife radiosurgery and their clinical responses have been encouraging to date.

Progressive neurological deficits with benign intracerebral cysts

1986 ◽  
Vol 65 (5) ◽  
pp. 706-709 ◽  
Author(s):  
Yoko Nakasu ◽  
Jyoji Handa ◽  
Kazuyoshi Watanabe
Keyword(s):  
Histological Examination ◽  
Computerized Tomography ◽  
Cyst Wall ◽  
Benign Lesion ◽  
Ct Scanning ◽  
Neurological Deficits ◽  
Review Of The Literature ◽  
Content Type ◽  
Ct Findings ◽  
Fine Print

✓ Two patients with benign intracerebral cysts are reported and a brief review of the literature is given. Although computerized tomography (CT) scanning is useful in detecting a variety of intracerebral cysts, the CT findings are not specific for any lesion. An exploratory operation with establishment of an adequate route of drainage and a histological examination of the cyst wall are mandatory in the management of patients with a progressive but benign lesion.

Teratoma of the fourth ventricle

1973 ◽  
Vol 38 (3) ◽  
pp. 355-357 ◽  
Author(s):  
Robert J. Morelli
Keyword(s):  
Fourth Ventricle ◽  
Rare Case ◽  
Surgical Removal ◽  
Malignant Teratoma ◽  
Content Type ◽  
Fine Print

✓ The author reports a rare case in which a primary malignant teratoma presented as an obstructing mass in the fourth ventricle. The tumor was not cystic but well encapsulated, and a gross total surgical removal was accomplished. A fatal recurrence occurred within 3 months.

Intracranial xanthogranuloma of the dura in Hand-Schüller-Christian disease

1993 ◽  
Vol 78 (2) ◽  
pp. 297-300 ◽  
Author(s):  
Zain Alabedeen B. Jamjoom ◽  
Vinita Raina ◽  
Abdulfattah Al-Jamali ◽  
Abdulhakim B. Jamjoom ◽  
Basim Yacub ◽  
...  
Keyword(s):  
Intracranial Pressure ◽  
Clinical Features ◽  
Obstructive Hydrocephalus ◽  
Relevant Literature ◽  
Increased Intracranial Pressure ◽  
Falx Cerebri ◽  
Content Type ◽  
Tentorium Cerebelli ◽  
Ultrastructural Studies ◽  
Fine Print

✓ The authors describe a 37-year-old man with the classic clinical features of Hand-Schüller-Christian disease. He presented with symptoms of increased intracranial pressure due to obstructive hydrocephalus secondary to a huge xanthogranuloma involving falx cerebri and tentorium cerebelli. Immunohistochemical and ultrastructural studies failed to demonstrate Langerhans histiocytes, however. The implication of this finding is discussed in light of the recent relevant literature.

Fourth ventricular schwannoma

1990 ◽  
Vol 73 (5) ◽  
pp. 777-781 ◽  
Author(s):  
Gary Redekop ◽  
Kost Elisevich ◽  
Joseph Gilbert
Keyword(s):  
Fourth Ventricle ◽  
Content Type ◽  
Radiographic Features ◽  
Unusual Location ◽  
Pontomedullary Junction ◽  
Fine Print

✓ A schwannoma arising from the dorsum of the pontomedullary junction and presenting as an exophytic mass in the fourth ventricle is described. A ventricular schwannoma has not previously been reported in the literature. The presenting clinical and radiographic features and the pathology of this tumor are summarized, and an explanation is sought for its unusual location.

Transcerebellomedullary fissure approach with special reference to the methods of dissecting the fissure

2001 ◽  
Vol 94 (2) ◽  
pp. 257-264 ◽  
Author(s):  
Toshio Matsushima ◽  
Tooru Inoue ◽  
Takanori Inamura ◽  
Yoshihiro Natori ◽  
Kiyonobu Ikezaki ◽  
...  
Keyword(s):  
Fourth Ventricle ◽  
Posterior Margin ◽  
Lateral Wall ◽  
Microsurgical Anatomy ◽  
Optimal Method ◽  
Content Type ◽  
Lateral Recess ◽  
Tela Choroidea ◽  
Opening Method ◽  
Fine Print

Object. The purpose of the present study was to refine the transcerebellomedullary fissure approach to the fourth ventricle and to clarify the optimal method of dissecting the fissure to obtain an appropriate operative view without splitting the inferior vermis. Methods. The authors studied the microsurgical anatomy by using formalin-fixed specimens to determine the most appropriate method of dissecting the cerebellomedullary fissure. While dissecting the spaces around the tonsils and making incisions in the ventricle roof, the procedures used to expose each ventricle wall were studied. Based on their findings, the authors adopted the best approach for use in 19 cases of fourth ventricle tumor. The fissure was further separated into two slit spaces on each side: namely the uvulotonsillar and medullotonsillar spaces. The floor of the fissure was composed of the tela choroidea, inferior medullary velum, and lateral recess, which form the ventricle roof. In this approach, the authors first dissected the spaces around the tonsils and then incised the taenia with or without the posterior margin of the lateral recess. These precise dissections allowed for easy retraction of the tonsil(s) and uvula and provided a sufficient view of the ventricle wall such that the deep aqueductal region and the lateral region around the lateral recess could be seen without splitting the vermis. The dissecting method could be divided into three different types, including extensive (aqueduct), lateral wall, and lateral recess, depending on the location of the ventricle wall and the extent of surgical exposure required. Conclusions. When the fissure is appropriately and completely opened, the approach provides a sufficient operative view without splitting the vermis. Two key principles of this opening method are sufficient dissection of the spaces around the tonsil(s) and an incision of the appropriate portions of the ventricle roof. The taenia(e) with or without the posterior margin of the lateral recess(es) should be incised.

Fourth ventriculoceles with extracranial extension

1984 ◽  
Vol 61 (2) ◽  
pp. 348-350 ◽  
Author(s):  
Robert A. Fenstermaker ◽  
Uros Roessmann ◽  
Harold L. Rekate
Keyword(s):  
Cerebrospinal Fluid ◽  
Clinical Outcome ◽  
Fourth Ventricle ◽  
Pathological Findings ◽  
Direct Communication ◽  
Content Type ◽  
Cyst Excision ◽  
Occipital Encephalocele ◽  
Fine Print

✓ The radiographic features and long-term clinical outcome in three patients who presented at birth with a cystic suboccipital mass in direct communication with the fourth ventricle are reviewed. The pathological findings in a fourth infant who died are also discussed. All surviving infants were treated with cyst excision and diversion of cerebrospinal fluid. The prognosis in these children, followed from 6 to 20 years, surpasses that of the more common occipital encephalocele, for which this entity could be mistaken. The morphogenetic implications relative to more common congenital lesions in this location are discussed.

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