What HYDROMYELIA means: Hydromyelia - refers to an abnormal widening of the central canal of the spinal cord that creates a cavity in which cerebrospinal fluid (commonly known as spinal fluid) can accumulate. As spinal fluid builds up, it may put abnormal pressure on the spinal cord and damage nerve cells and their connections. Hydromyelia is sometimes used interchangeably with syringomyelia, the name for a condition that also involves cavitation in the spinal cord. In hydromyelia, the cavity that forms is connected to the fourth ventricle in the brain, and is almost always associated with infants and children who have hydrocephalus or birth defects such as Chiari Malformation II and Dandy-Walker Malformation. Syringomyelia, however, features a closed cavity and occurs primarily in adults, the majority of whom have Chiari Malformation II or have experienced spinal cord trauma. Symptoms, which may occur over time, include weakness of the hands, arms, and legs; and sensory loss in the neck and arms.
- Definition Huntington'S Disease:
- Dictionary Disease - is caused by a trinucleotide repeat expansion in the gene coding for Huntingtin protein (Htt) and is one of several polyglutamine diseases. This expansion produces an altered form of the hydromyelia definition.
- Definition Hemiplegia Alterans:
- Dictionary Alternating hemiplegia is a rare neurological disorder that develops in childhood, usually before the first 4 years. The disorder is characterized by recurrent but temporary episodes of paralysis hydromyelia explain.
- Definition Hemicrania Continua:
- Dictionary Hemicrania continua is a rare form of chronic headache marked by continuous pain on one side of the face that varies in severity. Superimposed on the continuous but fluctuating pain are occasional hydromyelia what is.
- Definition Hughes Syndrome:
- Dictionary Antiphospholipid syndrome (APS or APLS) or antiphospholipid antibody syndrome is a disorder of coagulation, which causes blood clots (thrombosis) in both arteries and veins, as well as pregnancy hydromyelia meaning.
