一般位于脑底动脉环的动脉分叉处的浆果样动脉瘤,其直径常不超过l厘米,除破裂并表现为蛛网膜下腔出血外,呈肿物表现是很少的。但动脉瘤也可以很大,并在其增大过程中侵蚀邻近骨质且压迫邻近的颅神经或脑组织,而有相应的症状和体征。这类大型动脉瘤的临床表现可与其他颅内占位性病变很相似,以致有时在鉴别诊断中,动脉瘤甚至未被考虑在内。 A berry-like aneurysm that is typically located at the bifurcation of the cerebral artery arterial ring is often less than 1 cm in diameter. Except for the rupture and manifestation of subarachnoid hemorrhage, the appearance of a tumor is very small. However, the aneurysm can also be large, and in the process of its enlargement it erodes the adjacent bone and compresses the adjacent cranial nerve or brain tissue with corresponding symptoms and signs. The clinical manifestations of this type of large aneurysm can be very similar to other intracranial space-occupying lesions, so that sometimes in the differential diagnosis, the aneurysm is not even taken into consideration.