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In most of the symptomatic patients, the spinal cord is split into halves by a bony spicule or fibrous band, each half being surrounded by a dural sac. Other conditions, such as intramedullary tumors , tethered cord , dermoids , lipoma , syringomyelia , hydromyelia and Arnold–Chiari malformations have been described in medical literature, but ...
Tethered cord syndrome (TCS) refers to a group of neurological disorders that relate to malformations of the spinal cord. [1] Various forms include tight filum terminale , lipomeningomyelocele , split cord malformations ( diastematomyelia ), occult, dermal sinus tracts , and dermoids .
In a split cord malformation, some portion of the spinal cord is divided into parallel halves. The thecal sac may be divided and surround each half with a spike of cartilage or bone dividing the halves (Type I), or both halves may be present within the same sac where the dura is bound to a band of fibrous tissue (Type II).
Congenital vertebral anomalies are a collection of malformations of the spine. Most, around 85%, are not clinically significant, but they can cause compression of the spinal cord by deforming the vertebral canal or causing instability. This condition occurs in the womb.
Craniorachischisis is a variant of rachischisis that occurs when the entire spinal cord and brain are exposed – simultaneous complete rachischisis and anencephaly. It is incompatible with life; affected pregnancies often end in miscarriage or stillbirth. Infants born alive with craniorachischisis die soon after birth. [1] [2]
Two of the genetic disorders that may affect spinal tumors, include Von Hippel-Lindau disease and Neurofibromatosis 2. Von Hippel-Lindau disease is a non-cancerous tumor of blood vessels that occur in the brain, spinal cord, or even tumors in the kidneys. The Neurofibromatosis 2 is a non-cancerous tumor that usually affects the nerves for hearing.
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.
Common forms include anorectal malformation and duplication of the external genitalia, [7] while less common forms may include incomplete duplication of the lower spine and spinal cord, (diastematomyelia) [8] and partial fusion to complete duplication of the uterus, vagina, colon, and bladder. [9]
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