Incidental Saccular Aneurysm in Brain


Aneurysms are incidentally detected when brain imaging is done for indications other than subarachnoid hemorrhage. The most common indication for brain MRI/MR Angiogram is stroke. It is also done in people who have a high risk of getting brain stroke in future (on account of risk factors and family history).

In our case, a 45-year old presented with recurrent episodes of speech impairment. Brain MRI was normal. However, MR Angiogram showed a 4 mm size saccular aneurysm arising from M2 segment of left middle cerebral artery (MCA).

The incidence of incidental saccular aneurysms on brain MR Angiogram has been found to be 1.8%. It is more common in women than men. The commonest location is MCA bifurcation (about 35% of all incidental aneurysms) and the mean size is 4 mm.

As there is a risk of aneurysm rupture in future, treatment should be advised to those detected with incidental aneurysms. Treatment options include clipping and coiling.

Published by Dr Sudhir Kumar MD (Medicine) DM (Neurology)

I am a doctor with 25 years experience. I have worked as a neurologist for about 20 years. Educating public and healthcare professionals is very dear to me. This is possible due to my interactions with thousands of patients and their caregivers. I salute the patients who suffer and it is our duty to minimise suffering by preventing diseases and ensuring prompt diagnosis and treatment of those already affected.

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