A cavernous aneurysm
is a common finding that if truly cavernous, indicates that it is located outside of the brain and generally carries a benign prognosis.
It may be of concern if it gets sufficiently large (usually > 1.5 cm) and presses on important nerves. Treatment is usually endovascular, including now flow diverting devices. Smaller cavernous aneurysms are usually managed conservatively.