Venous angioma is also referred to as DVA (developmental venous anomaly) or venous malformation. It is caused by a certain kind of malformation of veins which deviate from normal. This disease is characterized by development of lesions, usually bluish in color, which might appear on any body part.
These lesions are apparently harmless and for this reason they are usually left dormant throughout the entire life in most instances. Existence of any kind of symptoms is also unheard due to their extremely dormant nature. Nevertheless, in a few exceptional cases complications of seizures and brain hemorrhages are heard. Many people are deluded by the misconception of associating it with headache as a profound indication which is far from the actual fact.
Fact behind the Formation of DVA
The key factor of this disease is a small tangle of veins which vary from the normal ones. This is a most usual form of brain vascular malformation of the central nervous system of the brain and there is nothing abnormal in it. Therefore as per some health experts, it is not even logical to call it a disease; it is just a kind of deviation from normal or in other words, some type of abnormality.
Also it is found to be prevalent among 2 to 3% of people. These malformed veins drain blood from the brain and this is the initiation of venous angioma. The nature and causal factors behind it are still obscure. However, it is found that DVA is not hereditary; it is rather earned congenitally, which means, one bears these conditions since birth. In some cases it has been observed that this type of abnormal veins undergo self evolutionary changes. To put it more scientifically, they change themselves radiologically over many years.
Cavernous hemangiomas is one of them and it is observed after close supervision and study that some kind of venous malformations are associated with this other type of vascular malformation. Instances of hemorrhages associated with venous malformation are most often caused by cavernous hemangiomas. Therefore, in surgical attempts the cavernous hemangiomas is actually removed instead of DVA.
Detection of Venous Angioma
The entire matter is associated with the brain. And so the detection procedure entirely depends on brain scan. Different scanning procedures are followed for detecting DVA out of which cerebral angiography is the most popular method. However CAT scan and MRI scan could also play a significant role if done with enhanced contrast. Similar results are also observed in CT-angiography.
However, MRA or magnetic resonance angiography is not a good or recommended way to observe the existence of venous malformation since MRA emphasizes the arterial sides instead of venous sides of the circulation. Larger venous angioma could easily be detected by magnetic resonance venography. In rare instances of hemorrhage, CAT scan is strongly recommended than other tests since it could easily detect the hemorrhage.
Remedial Methodology for DVA
Venous malformation, in most of the cases, causes no complications, and therefore their treatment is almost unnecessary. Most neurosurgeons suggest leaving them undisturbed unless they are causing seizures or hemorrhage in extreme cases. Surgical attempts are mostly avoided due to a potential risk of venous stroke associated with direct surgical removal.
Even in case of seizures, initial attempts are taken to rule it out with medications so as to avoid surgical incision. In the absence of arteriovenous malformation, it is easier to treat the seizures using proper medication. There are several oral medications meant particularly for antiseizure purpose like phenytoin.
Still if the situation persists and no remarkable change is noticed within specified time, then medication is replaced by surgery. In many instances where the venous angioma is ruptured, surgical procedure is conducted. While carrying on surgical incision on a ruptured DVA, often a preexistence of an undetected cavernous malformation or AVM is found. Under such circumstances, surgeons prefer to remove the later instead of disturbing the venous malformation.
Stereotactic radiosurgery is one more popular technique of modern surgical innovation. In this technique, the affected zone of the brain is subjected to radiation without harming the adjoining portions. However this method is also not completely out of risk since the success of the entire procedure depends on how precisely the doctors are able to detect the location of the DVA formation. One single mistake might expose the fresh brain cells under radiation, the impact of which might become rather adverse.