目的 探讨长骨原发性骨恶性纤维组织细胞瘤(PBMFH)的影像学表现.方法 收集经手术病理证实的10例长骨PBMFH患者的临床资料和影像学资料,10例均行MR及X线检查,6例行CT检查.结果 9例为单发,1例为单骨多发;7例表现为溶骨性骨质破坏,3例表现为混合性骨质破坏;骨膜反应1例;3例病灶内部可见粗大的骨嵴;T1WI呈等、稍低信号,T2WI呈稍高信号,内部均可见坏死区,不均匀性明显强化;8例伴有超出骨质破坏范围的软组织肿块.结论长骨PBMFH有一定的影像学特点,有助于诊断.
Objective To investigate the imaging findings of primary bone malignant fibrous histiocytoma (PBMFH) in long bone. Methods MRI and XV ray examinations were performed in 10 patients with PBMFH in long bone confirmed by histology. CT scans were performed in 6 cases. Results Nine cases had single and 1 case had multiple lesions of single bone. Seven cases showed osteolytic bone destruction, and 3 cases showed mixed bone destruction. Only 1 case showed periosteal reaction. Gross bony ridge was seen in 3 cases on CT scan. All the patients demonstrated isointensity or hypointensity on T1WI, and slight hyperintensity signal on T2WI. Necrosis was seen in the lesion of 10 cases. Four cases showed obvious but heterogeneous enhancement after contrast medium injection. Eight cases had soft tissue mass beyond the scope of bone destruction. Conclusions Some imaging features may suggest the diagnosis of PBMFH in long bone.