Mahnken A H, Tacke J, Wolter P, Büttner R, Haller J S, Günther R W
Department of Radiology, University Hospital, University of Technology Aachen, Pauwelsstrasse 30, 52074 Aachen, Germany.
Eur Radiol. 2002 Jan;12(1):85-9. doi: 10.1007/s003300101027. Epub 2001 Jul 17.
The aim of this study was to assess cross-sectional imaging features and the value of CT and MRI in primary hemangiopericytoma of bone. In five patients with histologically proven primary osseous hemangiopericytoma CT and MR scans were evaluated retrospectively. Both CT and MRI were available in four patients each. In three patients both imaging techniques were available. On CT primary hemangiopericytoma of bone presents as an expansive lytic lesion with bone destruction and inhomogeneous contrast enhancement. Magnetic resonance imaging depicts osseous hemangiopericytoma as hyperintense lesion on T2-weighted images with intermediate signal intensity on T1-weighted images. Curvilinear tubular structures of signal void in the tumor matrix on T1-weighted images and corresponding hyperintense structures on T2-weighted and on fat-suppressed short tau inversion recovery images were present in three patients. Although cross-sectional imaging findings are non-specific, they add to the diagnosis and provide valuable information about the extent of bone destruction and local tumor spread in patients with primary osseous hemangiopericytoma. While CT demonstrates the extent of bone destruction best, MRI better visualizes medullary and soft tissue extension of the tumor. Curvilinear signal abnormalities support the diagnosis of hemangiopericytoma of bone. This imaging pattern is best visualized on fat-suppressed or contrast enhanced T1-weighted MR images.
本研究的目的是评估骨原发性血管外皮细胞瘤的横断面成像特征以及CT和MRI的价值。对5例经组织学证实的原发性骨血管外皮细胞瘤患者的CT和MR扫描进行回顾性评估。4例患者同时有CT和MRI检查结果。3例患者两种成像技术均可用。CT上，骨原发性血管外皮细胞瘤表现为具有骨质破坏和不均匀强化的膨胀性溶骨性病变。磁共振成像显示骨血管外皮细胞瘤在T2加权像上为高信号病变，在T1加权像上为中等信号强度。3例患者在T1加权像上肿瘤基质内可见曲线状管状无信号结构，在T2加权像和脂肪抑制短tau反转恢复像上可见相应的高信号结构。虽然横断面成像结果不具有特异性，但它们有助于诊断，并为原发性骨血管外皮细胞瘤患者的骨质破坏范围和局部肿瘤扩散提供有价值的信息。CT最能显示骨质破坏的范围，而MRI能更好地显示肿瘤的髓腔和软组织侵犯情况。曲线状信号异常支持骨血管外皮细胞瘤的诊断。这种成像模式在脂肪抑制或增强T1加权MR图像上显示最佳。
