Hemorrhage into an intradiploic arachnoid cyst

1991 ◽  
Vol 75 (6) ◽  
pp. 969-971 ◽  
Author(s):  
Ashok Mahade Hande ◽  
Anil Pandurang Karapurkar
Keyword(s):  
Cerebrospinal Fluid ◽  
Arachnoid Cyst ◽  
Unusual Case ◽  
Arachnoid Cysts ◽  
Arachnoid Membrane ◽  
Content Type ◽  
Intradiploic Arachnoid Cyst ◽  
Extradural Arachnoid Cyst ◽  
Fine Print

✓ Intracranial arachnoid cysts are relatively rare; it is believed that they account for only 1% of all intracranial space-occupying lesions. When they occur in the intracranial cavity, they usually develop in relation to an arachnoid cistern as a pocket of cerebrospinal fluid within two layers of arachnoid membrane. Five cases of intradiploic arachnoid cysts have been reported, but an arachnoid cyst presenting as an extradural mass has not been described before. The authors present an unusual case of hemorrhage into a massive intracranial extradural arachnoid cyst with no intradural communication.

Intradiploic arachnoid cysts

1989 ◽  
Vol 70 (6) ◽  
pp. 954-958 ◽  
Author(s):  
Martin E. Weinand ◽  
Setti S. Rengachary ◽  
Douglas H. McGregor ◽  
Itaru Watanabe
Keyword(s):  
Arachnoid Cyst ◽  
Pathological Process ◽  
Arachnoid Cysts ◽  
Middle Fossa ◽  
Arachnoid Membrane ◽  
Cerebrospinal Fluid Fistula ◽  
Content Type ◽  
Intradiploic Arachnoid Cyst ◽  
Fluid Fistula ◽  
Fine Print

✓ Two patients are presented in whom cranial arachnoid cysts developed as diverticuli of the arachnoid membrane through small defects in the dura mater, eroded through the inner table, expanded within the diploe, and eroded the outer table of the skull. Based on observations at the time of surgery and the histological examination of these lesions, it is proposed that they are congenital in origin. Previously reported cases of “traumatic arachnoid cyst without fracture,” “intradiploic cerebrospinal fluid fistula,” and “middle fossa pitholes” appear to represent the same pathological process as the lesions reported in this paper. It is proposed that “intradiploic arachnoid cyst” is the most appropriate term by which these lesions should be described.

Primary spinal syringomyelia

2005 ◽  
Vol 3 (6) ◽  
pp. 429-435 ◽  
Author(s):  
Ulrich Batzdorf
Keyword(s):  
Spinal Cord ◽  
Cerebrospinal Fluid ◽  
Fluid Flow ◽  
Craniovertebral Junction ◽  
Arachnoid Cysts ◽  
Spinal Cord Tumors ◽  
Content Type ◽  
Cerebrospinal Fluid Flow ◽  
Different Types ◽  
Fine Print

✓ In the present review the author describes the different types of syringomyelia that originate from abnormalities at the level of the spinal cord rather than at the craniovertebral junction. These include posttraumatic and postinflammatory syringomyelia, as well as syringomyelia associated with arachnoid cysts and spinal cord tumors. The diagnosis and the principles of managing these lesions are discussed, notably resection of the entity restricting cerebrospinal fluid flow. Placement of a shunt into the syrinx cavity is reserved for patients in whom other procedures have failed or who are not candidates for other procedures.

Intramedullary arachnoid cyst

2002 ◽  
Vol 96 (1) ◽  
pp. 104-106 ◽  
Author(s):  
Ashish Goyal ◽  
Anil K. Singh ◽  
Daljit Singh ◽  
Vikas Gupta ◽  
Medha Tatke ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Case Report ◽  
Magnetic Resonance ◽  
Arachnoid Cyst ◽  
Marked Improvement ◽  
Unusual Case ◽  
Neurological Status ◽  
Resonance Imaging ◽  
Content Type ◽  
Fine Print

✓ The authors present an unusual case of intramedullary arachnoid cyst diagnosed in a patient after the lesion was resected. A wide decompressive surgery was performed and the lesion removed. Histopathological findings were consistent with the diagnosis of arachnoid cyst. Postoperatively the patient exhibited marked improvement in neurological status. To the best of the authors' knowledge, there is no case report of intramedullary arachnoid cyst reported in the literature. With the advent of newer neuroimaging modalities such as magnetic resonance imaging the number of cases of intramedullary arachnoid cysts encountered in the future may increase.

Angiographic differentiation between Dandy-Walker cyst and arachnoid cyst of the posterior fossa in newborn infants and children

1973 ◽  
Vol 38 (3) ◽  
pp. 298-308 ◽  
Author(s):  
Emanuele La Torre ◽  
Aldo Fortuna ◽  
Emanuele Occhipinti
Keyword(s):  
Posterior Fossa ◽  
Arachnoid Cyst ◽  
Posterior Inferior Cerebellar Artery ◽  
Newborn Infants ◽  
Infants And Children ◽  
Arachnoid Cysts ◽  
Content Type ◽  
Dural Sinuses ◽  
Cerebellar Artery ◽  
Fine Print

✓ Elevation of the tentorium and its dural sinuses, originally considered a diagnostic sign of Dandy-Walker cyst, may also occur in arachnoid cysts of the posterior fossa. Differentiation between these two lesions may be achieved angiographically by the evaluation of the posterior inferior cerebellar artery and its vermian branch, and of the inferior vermian vein. All these vessels are displaced forward and upward by an arachnoid cyst, while in the Dandy-Walker cyst the posterior inferior cerebellar artery is miniature and the vermian branch and the inferior vermian vein are absent.

Pathology of an arachnoid cyst

1979 ◽  
Vol 50 (2) ◽  
pp. 224-228 ◽  
Author(s):  
John Krawchenko ◽  
George H. Collins
Keyword(s):  
Arachnoid Cyst ◽  
Third Ventricle ◽  
Significant Degree ◽  
Histological Structure ◽  
Accidental Death ◽  
Arachnoid Membrane ◽  
Content Type ◽  
The Third ◽  
Interpeduncular Cistern ◽  
Fine Print

✓ Accidental death brought to autopsy a 19-year-old girl with an asymptomatic arachnoid cyst which had expanded from the region of the interpeduncular cistern so as to replace the third ventricle and extend into both lateral ventricles. Associated with this expansion was a significant degree of hydrocephalus, compression of the walls of the lateral ventricle, and obliteration of the normal structures of the floor of the third ventricle. The histological structure of the cyst wall and its relationship to the normal arachnoid are defined and found to consist of a reduplication of the normal arachnoid membrane resulting in a space within the arachnoid tissue. It is suspected but not proven that the cyst was congenital, resulting from an abnormality in development. Some suggestions are offered regarding the mechanism for its enlargement.

Cerebral vasospasm following intracranial hypotension caused by cerebrospinal fluid leak from an incidental lumbar durotomy

2005 ◽  
Vol 102 (1) ◽  
pp. 152-155 ◽  
Author(s):  
Claudia Chaves ◽  
Stephen R. Freidberg ◽  
Grace Lee ◽  
Vasilios Zeris ◽  
Sarah Ries ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Cerebral Vasospasm ◽  
Intracranial Hypotension ◽  
Unusual Case ◽  
Cerebrospinal Fluid Leak ◽  
Dural Tear ◽  
Content Type ◽  
Incidental Durotomy ◽  
Fluid Leak ◽  
Fine Print

✓ The authors report on the unusual case of a patient with intracranial hypotension following an incidental durotomy complicated by an extensive but reversible cerebral vasospasm. Despite the dural tear repair and correction of the intracranial hypotension, the vasospasm ran its course. The precise mechanism of the cerebral vasospasm in this patient is unclear.

Diagnosis and treatment of suprasellar arachnoid cyst

1979 ◽  
Vol 50 (4) ◽  
pp. 515-518 ◽  
Author(s):  
Raj Murali ◽  
Fred Epstein
Keyword(s):  
Computerized Tomography ◽  
Arachnoid Cyst ◽  
Preoperative Diagnosis ◽  
Third Ventricle ◽  
Arachnoid Cysts ◽  
Content Type ◽  
Choice Of Treatment ◽  
Suprasellar Arachnoid Cyst ◽  
Conray Ventriculography ◽  
Fine Print

✓ Three cases of suprasellar arachnoid cysts in children are described. The importance of differentiating such a lesion from a dilated third ventricle is stressed. The value of computerized tomography with Conray ventriculography in preoperative diagnosis, symptomatology, and choice of treatment are discussed.

Posttraumatic intradiploic meningoencephalocele

1996 ◽  
Vol 84 (2) ◽  
pp. 284-287 ◽  
Author(s):  
Arun-Angelo Patil ◽  
Hamid Etemadrezaie
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebrospinal Fluid ◽  
Magnetic Resonance ◽  
Brain Tissue ◽  
Blunt Trauma ◽  
Arachnoid Membrane ◽  
Resonance Imaging ◽  
Content Type ◽  
Parietal Area ◽  
Fine Print

✓ A case of posttraumatic intradiploic meningoencephalocele is reported. The patient presented with a progressively enlarging lump in the left parietal area approximately 8 months after a blunt trauma. Magnetic resonance imaging showed an intradiploic cyst containing cerebrospinal fluid and brain tissue. These findings were confirmed at surgery. In addition, the cyst was found to have a lining of arachnoid membrane.

Spinal intradural arachnoid cysts located anterior to the cervical spinal cord

1999 ◽  
Vol 91 (2) ◽  
pp. 211-215 ◽  
Author(s):  
Saim Kazan ◽  
Özgür Özdemir ◽  
Mahmut Akyüz ◽  
Recai Tuncer
Keyword(s):  
Spinal Cord ◽  
Arachnoid Cyst ◽  
Cervical Spinal Cord ◽  
Arachnoid Cysts ◽  
Cervical Region ◽  
Diagnostic Tools ◽  
Content Type ◽  
Contrast Enhanced Ct ◽  
Intradural Arachnoid Cysts ◽  
Fine Print

✓ The authors describe two rare occurrences of radiographically, surgically, and pathologically confirmed spinal intradural arachnoid cysts (not associated with additional pathological entities) that were located anterior to the cervical spinal cord. These lesions have been reported previously in only eight patients. The patients described in this report were young adults who presented with progressive spastic tetraparesis shortly after sustaining mild cervical trauma and in whom no neurological deficit or bone fracture was demonstrated. The presence of an intradural arachnoid cyst was detected on postcontrast computerized tomography (CT) myelography and on magnetic resonance imaging; both diagnostic tools correctly characterized the cystic nature of the lesion. Plain radiography, plain tomography, and contrast-enhanced CT scans were not diagnostic. In both cases a laminectomy was performed, and the wall of the cyst was excised and fenestrated with subarachnoid space. Postoperatively, the patients made complete neurological recoveries. Based on a review of the literature, arachnoid cysts of the spinal canal may be classified as either extra- or intradural. Intradural arachnoid cysts usually arise posterior to the spinal cord in the thoracic spine region; however, these cysts very rarely develop in the cervical region. The pathogenesis of arachnoid cysts is unclear, although congenital, traumatic and inflammatory causes have been postulated. The authors believe that the formation of an arachnoid cyst cannot be explained by simply one mechanism because, in some reported cases, there has been accidental or iatrogenic trauma in association with congenital lesions. They also note that an intradural arachnoid cyst located anterior to the cervical spinal cord is an extremely rare disorder that may cause progressive myelopathy; however, the postoperative prognosis is good.

Intraventricular arachnoid cyst

1988 ◽  
Vol 68 (3) ◽  
pp. 482-486 ◽  
Author(s):  
Hiroyuki Nakase ◽  
Manabu Hisanaga ◽  
Shigeo Hashimoto ◽  
Masami Imanishi ◽  
Shozaburo Utsumi
Keyword(s):  
Arachnoid Cyst ◽  
Lateral Ventricle ◽  
Relevant Literature ◽  
Arachnoid Cysts ◽  
Initial Symptom ◽  
Content Type ◽  
Fine Print

✓ Two patients with intraventricular arachnoid cysts are reported and a brief review of the relevant literature is presented. Arachnoid cysts are usually extracerebral or extraventricular. Intraventricular arachnoid cysts are rare: including the two cases reported here, only five cases have been described. The following characteristics were noted in these five patients: all were young; headache was the initial symptom in four; the cyst was in the trigone of a lateral ventricle in four; and there was dilatation of the inferior horn in three.

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