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The spinal cord is surrounded by three layers known as the spinal meninges. [7] These are the dura mater, arachnoid mater, and pia mater. Spinal cord tumors are classified based on their location within the spinal cord: intradural (intradmedullary and extramedullary) and extradural tumors. [citation needed] Intradural tumors are located within ...
Spinal nerve sheath tumors generally arise as single lesions. [1] Presence of multiple lesions is associated with genetic conditions including neurofibromatosis type 1, neurofibromatosis type 2, and Schwannomatosis. [1] [3] [4] Most spinal schwannomas are intradural-extramedullary, growing inside the thecal sac, but outside the spinal cord ...
Disc herniation can occur in any disc in the spine, but the two most common forms are lumbar disc herniation and cervical disc herniation. The former is the most common, causing low back pain (lumbago) and often leg pain as well, in which case it is commonly referred to as sciatica .
Tumor type Malignancy Estimated incidence Location Schwannoma Benign 1.09 per 100,000/year Skin and subcutaneous tissues of the head and neck, or along the flexor surfaces of the extremities; Spinal intradural extramedullary site with growth into foraminal space; Eight cranial nerve (bilateral involvement in NF2) Neurofibroma
The dura mater covering the spinal cord is known as the dural sac or thecal sac, and only has one layer (the meningeal layer) unlike cranial dura mater. The potential space between these two layers is known as the epidural space , [ 5 ] which can accumulate blood in the case of traumatic laceration to the meningeal arteries .
The etiology of dural ectasia is unknown, but it has been suggested that is due to increased hydrostatic pressure, [8] general weakened connective tissue [9] or as a result of the pulsatile flow of cerebrospinal fluid on weakened spinal dura. [10] Dural ectasia is common in Marfan syndrome, [3] occurring in 63–92% of people with the syndrome ...
Arachnoid cysts can be found on the brain or on the spine. Intracranial arachnoid cysts usually occur adjacent to the arachnoidal cistern. [23] Spinal arachnoid cysts may be extradural, intradural, or perineural and tend to present with signs and symptoms indicative of a radiculopathy. [23]
Spinal Cord Tumor Presentations. Pain is the first symptom in >90% of patients presenting with epidural metastasis and occurs less frequently with intradural tumors. [6] Mechanisms of pain include spinal cord ischemia and traction on the periosteum, dura, nearby soft tissues, and nerve roots. [6]
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