颅骨韧带样纤维瘤的影像学表现

Imaging Findings of Skull Desmoplastic Fibroma

目的探讨颅骨韧带样纤维瘤的影像学特点,提高对其诊断正确率。方法回顾性分析经手术病理证实的5例颅骨韧带样纤维瘤患者的影像学表现。结果 5例均为单发病灶,3例发生在顶骨,2例发生在额骨,病灶均呈膨胀性骨质破坏,内见残存骨嵴及钙化灶,骨皮质可中断,无明显软组织肿块,病变在MRI T1WI上呈混杂低信号,在T2WI上呈以高信号为主的混杂信号,增强后呈明显不均匀强化。结论颅骨韧带样纤维瘤多见于顶骨及额骨,以板障内膨胀性骨质破坏伴有粗大结节样钙化为其特征性表现。

Objective To discuss the imaging findings of skull desmoplastic fibroma and improve its diagnostic accura- cy. Methods Imaging findings of five patients with skull desmoplastic fibroma proved by pathology were retrospectively reviewed. Results Five cases were single lesions, three lesions were located in parietal bone, two in frontal bone. These lesions were expansile lytic with a reactive bony rim and calcification, cortical bone can be interrupted. The lesions were inhomogeneous hypointensity signal on T1 weighted images, and mixed signal intensity on T2 weighted images. On postcon- trast T1 weighted images, the masses showed inhomogeneous enhancement. Conclusion Desmoplastic fibroma of skull is often located in parietal and frontal bone, image features include a expansile lytic lesion with a ridge and nodular calcifica- tion.