Intradural Extramedullary Arachnoid Cyst Presenting as Arteriovenous Malformation in the Thoracic Spinal Cord

Arachnoid cysts in the spinal cord may be asymptomatic. In some cases arachnoid cysts may exert mass effect on the thoracic spinal cord and lead to pain and myelopathy symptoms. Arachnoid cysts may be difficult to visualize on an MRI scan because the thin walled arachnoid may not be visible. Focal displacement of the thoracic spinal cord and effacement of the spinal cord with apparent widening of the cerebrospinal fluid space is seen. This video demonstrates surgical techniques to remove a dorsal arachnoid cyst causing spinal cord compression. The surgery involves a thoracic laminectomy. The dura is opened sharply with care taken not to open the arachnoid so that the cyst can be well visualized. The thickened arachnoid walls of the cyst are removed to alleviate the compression caused by the arachnoid cyst.The video can be found here: http://youtu.be/pgUrl9xvsD0.

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Rapid expansion of a ventral arachnoid cyst after syringo-subarachnoid shunting in the thoracic spinal cord: case report

Surgical Neurology ◽

10.1016/j.surneu.2004.11.032 ◽

2005 ◽

Vol 64 (1) ◽

pp. 86-89 ◽

Cited By ~ 6

Author(s):

Andrew Jea ◽

Ramon Navarro ◽

Barth A. Green

Keyword(s):

Spinal Cord ◽

Case Report ◽

Arachnoid Cyst ◽

Rapid Expansion ◽

Thoracic Spinal Cord ◽

Thoracic Spinal

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Intradural Extramedullary Solitary Fibrous Tumor of the Thoracic Spinal Cord

Cureus ◽

10.7759/cureus.18613 ◽

2021 ◽

Author(s):

Zachary T Olmsted ◽

Joanna Tabor ◽

Omer Doron ◽

Hossein Hosseini ◽

Daniel Schneider ◽

...

Keyword(s):

Spinal Cord ◽

Solitary Fibrous Tumor ◽

Thoracic Spinal Cord ◽

Thoracic Spinal ◽

Intradural Extramedullary ◽

Fibrous Tumor

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Intradural Extramedullary Epithelioid Hemangioendothelioma of the Thoracic Spinal Cord: A Case Report

NMC Case Report Journal ◽

10.2176/nmccrj.cr.2020-0332 ◽

2021 ◽

Vol 8 (1) ◽

pp. 413-417

Author(s):

Munenari IKEZAWA ◽

Masashi FUJIMOTO ◽

Hirofumi NISHIKAWA ◽

Satoru TANIOKA ◽

Yusuke KURODA ◽

...

Keyword(s):

Spinal Cord ◽

Case Report ◽

Epithelioid Hemangioendothelioma ◽

Thoracic Spinal Cord ◽

Thoracic Spinal ◽

Intradural Extramedullary

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Symptomatic thoracic spinal cord compression caused by postsurgical pseudomeningocele

Arquivos de Neuro-Psiquiatria ◽

10.1590/s0004-282x2007000200017 ◽

2007 ◽

Vol 65 (2A) ◽

pp. 279-282 ◽

Cited By ~ 6

Author(s):

Arthur de Azambuja Pereira Filho ◽

Gustavo de David ◽

Gustavo de Azambuja Pereira Filho ◽

Albert Vincent Berthier Brasil

Keyword(s):

Spinal Cord ◽

Spinal Cord Compression ◽

Cord Compression ◽

Thoracic Spinal Cord ◽

Dural Closure ◽

First Case ◽

Thoracic Spinal ◽

Full Neurological Recovery ◽

Intradural Extramedullary ◽

Loss Of Strength

We report the first case of symptomatic thoracic spinal cord compression caused by postsurgical pseudomeningocele. A 49-year-old man sought treatment for progressive loss of strength in the lower extremities ten months after full neurological recovery for a thoracic (T11) intradural-extramedullary schwannoma. Magnetic resonance imaging revealed a postsurgical thoracic (T11-T12) pseudomeningocele. The surgical approach showed an inadequate dural closure with spontaneous cerebrospinal fluid fistula. The defect was sealed with suture, muscle and biological glue covering. The patient had a good recovery. Pseudomeningocele must take part of the differential diagnosis of myelopathy after thoracic spine surgery.

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Severe focal myelopathy secondary to chronic compression by an arachnoid pseudocyst in a Rottweiler

Journal of the Hellenic Veterinary Medical Society ◽

10.12681/jhvms.14872 ◽

2017 ◽

Vol 61 (1) ◽

pp. 23

Author(s):

Z. S. POLIZOPOULOU (Ζ.Σ. ΠΟΛΥΖΟΠΟΥΛΟΥ) ◽

V. D. SOUFTAS (Β.Δ. ΣΟΥΦΤΑΣ) ◽

G. BRELLOU (Γ. ΜΠΡΕΛΛΟΥ) ◽

M. N. PATSIKAS (Μ.Ν. ΠΑΤΣΙΚΑΣ) ◽

Ν. SOUBASIS (Ν. ΣΟΥΜΠΑΣΗΣ) ◽

...

Keyword(s):

Spinal Cord ◽

White Matter ◽

Cervical Spinal Cord ◽

Degenerative Change ◽

Spinal Reflexes ◽

Thoracic Spinal Cord ◽

Thoracic Spinal ◽

Body Magnetic Resonance Imaging ◽

Intradural Extramedullary ◽

Lesion Localization

A four-year old Rottweiler was presented with tetraplegia, established progressively over a 4-month period. Initiallythe dog developed paresis of the posterior limbs that subsequently evolved to tetraparesis and finally tetraplegia. Upon neurological examination the dog exhibited spastic tetraplegia with exaggerated spinal reflexes in all four limbs. The neuroanatomical lesion localization indicated a focal or diffuse cervical spinal cord disease. Cisternal myelography revealed obstruction of the contrast medium flow at the level of C5 vertebral body. Magnetic resonance imaging disclosed intradural-extramedullary compression of the spinal cord at the level of C5-C6 intervertebral disc by a spinal arachnoid pseudocyst, syrinx formation and myelopathy expressed as abnormally higher signal on T2-weighted images at the C5 segment level. Severe demyelination, involving exclusively the white matter of the grossly affected segments and extending rostrally into the brainstem and caudally into the thoracic spinal cord segments, was noticed on histopathology. The unusually severe secondary degenerative change in the cervical spinal cord white matter, inflicted by focal SAP compression, was the most interesting finding.

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Spontaneous Herniation of the Thoracic Spinal Cord: A Case Report

Journal of the Korean Radiological Society ◽

10.3348/jkrs.2001.45.4.353 ◽

2001 ◽

Vol 45 (4) ◽

pp. 353 ◽

Cited By ~ 1

Author(s):

Sung Chan Jin ◽

Seoung Ro Lee ◽

Dong Woo Park ◽

Kyung Bin Joo

Keyword(s):

Spinal Cord ◽

Case Report ◽

Thoracic Spinal Cord ◽

Thoracic Spinal ◽

Spontaneous Herniation

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Lipomeningocele associated with diplomyelia in a dog

Tierärztliche Praxis Ausgabe K Kleintiere / Heimtiere ◽

10.15654/tpk-170751 ◽

2018 ◽

Vol 46 (05) ◽

pp. 323-329 ◽

Cited By ~ 2

Author(s):

Nele Ondreka ◽

Sara Malberg ◽

Emma Laws ◽

Martin Schmidt ◽

Sabine Schulze

Keyword(s):

Spinal Cord ◽

Neurological Status ◽

Split Cord Malformation ◽

Lumbar Spinal Cord ◽

Histopathological Diagnosis ◽

Type I ◽

Thoracic Spinal Cord ◽

Thoracic Spinal ◽

Subcutaneous Mass ◽

Lumbar Spinal

SummaryA 2-year-old male neutered mixed breed dog with a body weight of 30 kg was presented for evaluation of a soft subcutaneous mass on the dorsal midline at the level of the caudal thoracic spine. A further clinical sign was intermittent pain on palpation of the area of the subcutaneous mass. The owner also described a prolonged phase of urination with repeated interruption and re-initiation of voiding. The findings of the neurological examination were consistent with a lesion localization between the 3rd thoracic and 3rd lumbar spinal cord segments. Magnetic resonance imaging revealed a spina bifida with a lipomeningocele and diplomyelia (split cord malformation type I) at the level of thoracic vertebra 11 and 12 and secondary syringomyelia above the aforementioned defects in the caudal thoracic spinal cord. Surgical resection of the lipomeningocele via a hemilaminectomy was performed. After initial deterioration of the neurological status postsurgery with paraplegia and absent deep pain sensation the dog improved within 2 weeks to non-ambulatory paraparesis with voluntary urination. Six weeks postoperatively the dog was ambulatory, according to the owner. Two years after surgery the owner recorded that the dog showed a normal gait, a normal urination and no pain. Histopathological diagnosis of the biopsied material revealed a lipomeningocele which confirmed the radiological diagnosis.

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