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Journal of Comparative Pathology Jan 2023Arachnoid cysts are cystic lesions that occur in spinal or intracranial locations in the leptomeningeal space. Four intracranial cases have been described in cats, three...
Arachnoid cysts are cystic lesions that occur in spinal or intracranial locations in the leptomeningeal space. Four intracranial cases have been described in cats, three of which were diagnosed by imaging techniques alone. We now report the clinical, gross and histopathological findings in a 5-year-old, male-neutered European Shorthair cat that presented with chronic, asymmetrical encephalopathy. Using magnetic resonance imaging, a focal, fluid-filled cavity that did not show contrast enhancement was identified in the left temporal and piriform lobes. Necropsy confirmed the presence of a cystic, meningeal cavity filled with clear, serous fluid. Histologically, the cyst had an irregular, hypereosinophilic surface and single psammoma bodies with moderate perivascular oedema in the adjacent neuroparenchyma. Immunohistochemical evidence of meningeal tissue surrounding the cyst confirmed the diagnosis of an arachnoid cyst, which should be considered as a differential diagnosis of intracranial, fluid-filled cavities.
Topics: Animals; Cats; Male; Arachnoid Cysts; Cat Diseases; Magnetic Resonance Imaging; Brain Diseases
PubMed: 36641986
DOI: 10.1016/j.jcpa.2022.12.002 -
Surgical Neurology Oct 1997Arachnoid cysts rarely occur within the lateral ventricles, with only 10 reported cases in the literature. They may arise from the arachnoid layer that is present in the... (Review)
Review
BACKGROUND
Arachnoid cysts rarely occur within the lateral ventricles, with only 10 reported cases in the literature. They may arise from the arachnoid layer that is present in the choroidal fissure.
CASE DESCRIPTION
This 25-year-old man with headache and a left jacksonian seizure had an intraventricular arachnoid cyst of the right occipital horn and trigone found on radiologic examination by computed tomography (CT) and magnetic resonance imaging (MRI). He was successfully treated by evacuation of the cyst and removal of its wall through a right parietooccipital craniotomy. Histologic studies of the cyst wall confirmed the presence of arachnoid cells and connective tissue.
CONCLUSIONS
Arachnoid cysts of the lateral ventricles occur in the occipital horns and trigone (all but 1 of 10 cases) in young patients with symptoms of intracranial hypertension. MRI well defines the relationship of the cyst with the ventricular wall. Surgical removal of the cyst wall or cystoperitoneal shunt have been successfully performed in the reported cases; however, endoscopic fenestration of the cyst must be considered today as the treatment of choice.
Topics: Adult; Arachnoid Cysts; Cerebral Ventricles; Humans; Magnetic Resonance Imaging; Male
PubMed: 9315140
DOI: 10.1016/s0090-3019(96)00550-2 -
British Journal of Neurosurgery Jun 2021Intradural arachnoid cyst is a rare complication of lumbar puncture, post-trauma or post-intraoperative durotomies. We aim to estimate the incidence of early intradural...
PURPOSE
Intradural arachnoid cyst is a rare complication of lumbar puncture, post-trauma or post-intraoperative durotomies. We aim to estimate the incidence of early intradural arachnoid cyst radiologically in non-instrumented posterior lumbar decompression among symptomatic patients, and establish clinical correlation.
MATERIALS AND METHODS
Patients who underwent lumbar decompression without instrumentation at a tertiary spinal service between December 2014 and January 2018 were identified. When MRI scans were performed post-operatively within 14 days, imaging, medical and operative records were reviewed by two consultant neuroradiologists.
RESULTS
488 operations were included. 46 operations were followed by an early MRI scan. 59% were requested to investigate new or ongoing pain. Ten demonstrated an intradural arachnoid cyst - seven had no documented durotomy. Eight were primary operations, three were emergency operations. Statistically, we have not identified durotomy, primary-vs-revision surgery, and elective-vs-emergency surgery as risk factors. Two patients required revision operations, of these, one had a repeat post-operative scan, where the cyst resolved following further decompression at the index level, without intradural exploration.
CONCLUSIONS
Intradural arachnoid cyst may complicate posterior lumbar decompression. To our knowledge, this is the first study to assess its incidence as an early post-operative radiological finding, which is likely to be commoner than we recognise. It may be a cause of persisting post-operative pain.
Topics: Arachnoid Cysts; Decompression; Humans; Lumbosacral Region; Magnetic Resonance Imaging; Radiography
PubMed: 32924618
DOI: 10.1080/02688697.2020.1817313 -
Acta Medica Portuguesa 2014Arachnoid cysts are benign congenital cerebrospinal fluid collections, usually asymptomatic and diagnosed incidentally in children or adolescents. They may become...
Arachnoid cysts are benign congenital cerebrospinal fluid collections, usually asymptomatic and diagnosed incidentally in children or adolescents. They may become symptomatic after enlargement or complications, frequently presenting with symptoms of intracranial hypertension. We report an unusual case of progressive refractory headache in an adult patient due to an arachnoid cyst spontaneous rupture. Although clinical improvement occurred with conservative treatment, the subdural hygroma progressively enlarged and surgical treatment was ultimately needed. Spontaneous rupture is a very rare complication of arachnoid cysts. Accumulation of cerebrospinal fluid accumulation in the subdural space causes sustained intracranial hypertension that may be life-threatening and frequently requires surgical treatment. Patients with arachnoid cysts must be informed on their small vulnerability to cyst rupture and be aware that a sudden and severe headache, especially if starting after minor trauma or a Valsalva manoeuvre, always requires medical evaluation.
Topics: Adult; Arachnoid Cysts; Humans; Intracranial Hypertension; Male; Rupture, Spontaneous
PubMed: 24581205
DOI: No ID Found -
Ryoikibetsu Shokogun Shirizu 2000
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Child's Nervous System : ChNS :... Jul 2022Arachnoid cysts (ACs) are malformations that account for about 1% of all intracranial lesions. The aetiology and progression of these lesions have been debated, with one...
Arachnoid cysts (ACs) are malformations that account for about 1% of all intracranial lesions. The aetiology and progression of these lesions have been debated, with one possible explanation being the production of cerebro-spinal fluid (CSF) by ectopic choroid plexus (CP). To our knowledge, only seven cases of ACs incorporating CP have been reported, and we believe this to be the first reported case of a suprasellar AC containing ectopic CP. A 1-year-old boy presented with developmental delay and macrocephaly. MRI scan revealed hydrocephalus due to a suprasellar AC. An endoscopic ventriculocisternostomy was undertaken. Intra-operatively, intra-cystic, pink frond-like tissue resembling choroid plexus was identified. Histologically, the cyst wall was composed of fibrous tissue, with layered arachnoid cells, while the frond-like tissue was composed of papillary structures in keeping with normal choroid plexus tissue. We postulate that the rest of the ectopic CP may have been trapped within the double layered arachnoid fold of the diencephalic leaf of Liliequist's membrane which may drive the formation and development of certain suprasellar ACs.
Topics: Arachnoid Cysts; Choroid Plexus; Humans; Hydrocephalus; Infant; Magnetic Resonance Imaging; Male; Ventriculostomy
PubMed: 34665306
DOI: 10.1007/s00381-021-05395-2 -
Neurology India 2022
Topics: Adult; Arachnoid Cysts; Cranial Fossa, Posterior; Humans
PubMed: 35864686
DOI: 10.4103/0028-3886.349602 -
The Journal of Craniofacial Surgery Jul 2019The study reported a case of an intrasellar arachnoid cyst with visual disturbances as the main symptom. Arachnoid cyst is a common intracranial benign space-occupying... (Review)
Review
The study reported a case of an intrasellar arachnoid cyst with visual disturbances as the main symptom. Arachnoid cyst is a common intracranial benign space-occupying lesion, but rarely seen in intrasellar region with less than 100 cases reported available in English language literature. Therefore, it is still controversial about the diagnosis and treatment of such patients. This article reviewed previous literature and discussed the differential diagnosis and surgical strategies of intrasellar arachnoid cyst in combination with our own case.
Topics: Adult; Arachnoid Cysts; Diagnosis, Differential; Female; Humans; Sella Turcica
PubMed: 31299791
DOI: 10.1097/SCS.0000000000005315 -
British Journal of Neurosurgery Oct 2023We report an elderly patient with a symptomatic and growing arachnoid cyst. Physician should be cautious in counseling asymptomatic arachnoid cyst patients, regardless... (Review)
Review
We report an elderly patient with a symptomatic and growing arachnoid cyst. Physician should be cautious in counseling asymptomatic arachnoid cyst patients, regardless of their age, and inform them of the possibility, although rare, of growth and symptom development even in their late life.
Topics: Humans; Aged; Arachnoid Cysts
PubMed: 33258701
DOI: 10.1080/02688697.2020.1836326 -
Neurocirugia (English Edition) 2020Spinal arachnoid cysts are rare entities, most of which have a congenital or spontaneous etiology. Secondary cases are infrequent and can constitute a cause of... (Review)
Review
Spinal arachnoid cysts are rare entities, most of which have a congenital or spontaneous etiology. Secondary cases are infrequent and can constitute a cause of neurological deterioration several months or years after spinal trauma. We present the case of a male patient with traumatic spinal arachnoid cyst, together with a review of the cases published to date. Finally, we explain the different surgical options for this pathology relating them to the physiopathological theories that try to explain the origin of these lesions.
Topics: Arachnoid Cysts; Humans; Magnetic Resonance Imaging; Male; Spinal Cord Compression; Spinal Cord Diseases
PubMed: 31611140
DOI: 10.1016/j.neucir.2019.07.002