Li Xi, Tan Lilian, Ouyang Xiaoming, Jiang Jindai, Huang Sumeng, Huang Yong, Li Shuxin, Chen Deji
Department of Radiology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China.
Department of Pathology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China.
Oncol Lett. 2018 Jun;15(6):8825-8832. doi: 10.3892/ol.2018.8426. Epub 2018 Apr 4.
The aim of the present study was to investigate magnetic resonance (MR) features of meningeal solitary fibrous tumors (SFTs) in order to improve their recognition. The study retrospectively analyzed MR manifestations in 12 cases of meningeal SFTs confirmed by surgery. The lesions were analyzed in terms of the site of their growth, growth mode, morphology, size, changes in the MR signal and the edge of the focus. The tumors were malignant in 3 cases, benign in 7 cases and borderline in 2 cases. A total of 3 cases spanned the tentorium cerebelli, 3 spanned the falx and another case was close to the falx. Overall, 4 superficial tumors were accompanied by adjacent bony destruction. One case was located at the triangular area created by the right lateral ventricles. The tumors were all lobular, with a large diameter and more cystic areas in the center of the focus. The signals were often heterogeneous. The parenchyma in the tumors was significantly enhanced. For certain tumors, the signal was usually inhomogeneous and not uniform. The MR features of a SFT were often similar to other intracranial tumors and easily misdiagnosed. There were certain innate characteristics, for example, the tumor was often a solitary large soft-tissue mass with an irregular edge and a clear boundary, with a lobulated contour, and was widely involved with other tissues. The tumors often grew across either the falx or tentorium cerebelli. A significantly inhomogeneous signal was found and either a low or low-high mixed signal on T2-weighted images in particular. These features are useful for the differential diagnosis of SFTs and other tumors.
本研究的目的是探讨脑膜孤立性纤维瘤（SFTs）的磁共振（MR）特征，以提高对其的认识。该研究回顾性分析了12例经手术确诊的脑膜SFTs的MR表现。从病变的生长部位、生长方式、形态、大小、MR信号变化及病灶边缘等方面进行分析。其中3例为恶性肿瘤，7例为良性肿瘤，2例为交界性肿瘤。共有3例肿瘤跨越小脑幕，3例跨越大脑镰，另1例靠近大脑镰。总体而言，4例浅表肿瘤伴有相邻骨质破坏。1例位于右侧脑室形成的三角区。肿瘤均呈分叶状，直径较大，病灶中心有较多囊变区。信号常不均匀。肿瘤实质明显强化。对于某些肿瘤，信号通常不均匀且不一致。SFTs的MR特征常与其他颅内肿瘤相似，容易误诊。其具有一定的固有特征，例如，肿瘤常为孤立的大软组织肿块，边缘不规则但边界清晰，呈分叶状轮廓，且广泛累及其他组织。肿瘤常跨越大脑镰或小脑幕生长。尤其在T2加权像上可发现明显不均匀信号，呈低信号或低-高混合信号。这些特征有助于SFTs与其他肿瘤的鉴别诊断。
