关键词: 血管周细胞瘤, 脑膜瘤, 磁共振成像

Abstract: 【Abstract】〓Objective〓To explore the magnetic resonance imaging (MRI) features of intracranial hemangiopericytoma (HPC) and meningioma (M) in the similar location, and to help to improve the differential diagnosis and reduce the misdiagnosis. Methods MRI manifestation was retrospectively analyzed in 4 cases of intracranial hemangiopericytoma and 5 cases of meningioma in the similar location from 2011 to 2015. All cases were confirmed by surgery and pathology. Results〓In the left frontal area, there were one case of hemangiopericytoma and 2 cases of meningioma. In the left occipital area, the bottom of the left cranial fossa and the posterior fossa under the cerebellar tentorium, there were one case of hemangiopericytoma and one case of meningioma, separately. All of nine cases were with lobulated sign (HPC: 4; M: 5), and 8 cases were with necrosis and cystic changes (HPC: 4; M: 4). Vascular flowing void effect existed in 4 cases (HPC: 4; M: 0). Seven were with peritumoral edema (HPC: 3; M: 4). Four cases with bone changes including HPC in two, in which one with skull metastasis and one was adjacent bone destruction, M in two, one with adjacent osteosclerosis, another with adjacent bone destruction. Dural tail sign existed in 5 cases (HPC: 1; M: 4). Comparing with meningioma, HPC often has irregular form with obvious lobulated signal and uneven parenchyma signals which demonstrate as obvious necrosis and cystic changes. In T1-weighted imaging (T1WI), the signal of its substantial were slightly higher than that of meningioma. Vascular flowing void effect and peritumoral edema were relatively common in HPC while dural tail signs were relatively rare..Conclusion...Comparing to the meningioma,.the hemangiopericytoma appeared to have relatively more common signs of lobulated signs,.vascular flowing void effect, obvious necrosis and cystic changes and skull metastasis. This may have a certain significance in the differential diagnosis between intracranial hemangiopericytoma and meningioma in MRI.

Key words: Hemangiopericytoma, Meningioma, Magnetic resonance imaging