A brain tumour is a mass or growth of abnormal cells in the brain. Tumours may be benign (non-cancerous) or malignant (cancerous) and are classed as primary, meaning they stat in the brain or metastatic, which means they result from cancers occurring elsewhere in the body. The rate of growth of a tumour varies depending on its type while its location will determine how the function of the nervous system is affected. There are many different types of brain tumours which cause a variety of symptoms.
Hydrocephalus, often called water on the brain, is an abnormal build-up of cerebrospinal fluid (CSF) in the ventricles (cavities) deep within the brain. This excess CSF causes the ventricles to widen which puts pressure on the brain’s tissues, squashing them. The condition affects both children and adults but is most commonly seen in older adults and infants.
Movement disorders are a group of neurological disorders that affect a person's ability to move or the way they move. People may suffer from increased involuntary movements or voluntary movements may be slowed or reduced. There are many different types of movement disorders which may be caused by disease, underlying genetic conditions, toxins, medications or other brain injuries.
There are many other conditions that can affect the CNS (brain and spinal cord) which may result from trauma, disease, environmental causes or underlying genetic conditions.