hi,
last day a girl of 18 years old, with a neck pain and some head ate owing to a diifculty of foucusing of the right eye, has a head TC where there're more masses with density high than the blood in a blood zone in the right part of little brain zone .
in this zone of blood there's no show continus formation of blood vessel near this masses also after a recostruction of TC slices.
how can we discriminate a gapes of aneurysmes than something else?
To evaluate for aneurysms, consider doing CT angiogram so you can visualize the intracranial vessels. Difficult to tell without contrast administration if there are other reasons why there is hemorrhage. It can also be an underlying mass where you need MRI with and without contrast once the hemorrhage evolves.
A cluster of vessels appearing as a grape configuration could be tortuous vessels due to a vascular malformation/glomus jugulare tumor, if u mean in the posterior fossa (little brain) can be a differential. A non invasive non contrast MR angiogram can be of help.