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Subacute compression develops over days to weeks. Acute compression develops within minutes to hours. Acute compression may follow subacute and chronic compression, especially if the cause is abscess or tumor. Regardless of the pace, spinal cord compression will predictably progress over time. [1] [2]
The spinal cord is a long, cylindrical anatomical structure that is located within the vertebral cavity. It runs from the foramen magnum of the skull to the conus medullaris at the lumbar spine. [1] Most symptoms from spinal tumors occur due to compression of the spinal cord as it plays a primary role in motor and sensory function. [13]
This contributes to narrowing the spinal canal and compressing the spinal cord in the corresponding region. Herniated disk due to tearing of the spinal disk over time, causes the disk to protrude and exert pressure on surrounding spinal nerve tissue. Consequent compression on the spinal cord at the cervical region causes CSM. [12]
When due to trauma, myelopathy is known as (acute) spinal cord injury. When inflammatory, it is known as myelitis. Disease that is vascular in nature is known as vascular myelopathy. In Asian populations, spinal cord compression often occurs due to a different, inflammatory process affecting the posterior longitudinal ligament. [citation needed]
Once the spinal injury has occurred, one of two things may happen. Firstly, hemorrhaging within the spinal cord may cause compression, which damages the spinal cord even further. Another consequence of myelomalacia is improper circulation of blood to the area damaged, resulting in further damage to the spinal cord. [citation needed]
Differential diagnosis Compression of the upper spinal cord , multiple sclerosis , transverse myelitis , Behçet's disease , osteogenesis imperfecta In neurology , Lhermitte phenomenon , also called the barber chair phenomenon , is an uncomfortable "electrical" sensation that runs down the back and into the limbs.
With some myeloma drug therapies, over 30% of people experience a "Grade 3" or higher infection (many people experience multiple such infections), [33] calling for intervention at least by antibiotics. [32] Of people who die within 6 months of their myeloma diagnosis, between 20% and 50% die from collateral infections. [30]
Spread of cancer to the bone or spinal cord can lead to back pain. Bone is one of the most common sites of metastatic lesions. Patients typically have a history of malignancy. Common types of cancer that present with back pain include multiple myeloma, lymphoma, leukemia, spinal cord tumors, primary vertebral tumors and prostate cancer. [14]