Usually, the region of the brain where a lesion is located will not function as it normally would.
Symptoms can be gradual or sudden and may be intermittent or constant.
Each jot down of lesion has an emblematic pattern when it comes to the timing of symptoms.
Rafe Swan / Getty Images
Common symptoms of brain lesions may include a combination of general and focal symptoms.
The ischemic part of the lesion remains, with permanent damage to the affected area of the brain.
There can be recovery of function despite this.
This causes one or more demyelinating brain lesions.
The condition is usually idiopathic (without a known cause).
PML generally affects people who are severely immunocompromised, and it has a high mortality rate.
Many types of brain infections can resolve with appropriate treatment.
The cause of brain tumors is usually unknown.
Tumors that metastasize and cause lesions in the brain may have known risk factors.
For example, smoking increases the risk of lung cancer,which can spread to the brain.
Vascular
Blood vessel problems such asbrain aneurysmsandarteriovenous malformations (AVMs)are usually idiopathic.
They can be congenital (present from birth) or develop later in life.
Contusions in the brain usually partially or fully heal over time.
Hemorrhage
Bleeding in the brain can cause a hemorrhagic lesion.
These lesions are more life-threatening than non-hemorrhagic lesions.
Sometimes these malformations lead to impaired physical and cognitive deficits and seizures.
But the condition must be controlled even when lesions are not visibly present.
Lesions due to trauma may cause symptoms and physical examination changes with minimal imaging changes.
Treatment
Brain lesion treatment depends on the cause.
Vascular malformations may need to besurgically treatedto prevent a rupture.
Yukitake M.Drug-induced progressive multifocal leukoencephalopathy in multiple sclerosis: A comprehensive review.Clinical and Experimental Neuroimmunology.
2013;20(4):e300-6.
