Yamazaki T, Maruoka S, Takahashi S, Saito H, Takase K, Nakamura M, Sakamoto K
Department of Radiology, Tohoku University School of Medicine, Sendai, Japan.
Skeletal Radiol. 1995 Jan;24(1):43-6. doi: 10.1007/BF02425946.
Avulsive cortical irregularity, a benign condition occurring only among children and adolescents, has been known to simulate malignancy not only radiologically but also microscopically. Therefore, in addition to plain radiographs, further studies including by magnetic resonance (MR) imaging may occasionally be required. MR images of seven cases of avulsive cortical irregularity of the femur were reviewed. In all cases, the lesion appeared hypointense on T1-weighted images and hyperintense on T2-weighted images, with a dark rim on both sequences at or near the sites of the bony attachment of the medial head of the gastrocnemius muscle. In all cases, bilateral involvement was demonstrated by plain radiography, computed tomography, and/or MR imaging. The authors suggest that avulsive cortical irregularity involves both femora much more frequently than has been reported previously.
撕脱性皮质不规则，一种仅发生于儿童和青少年的良性病症，已知不仅在放射学上而且在显微镜下都可能模拟恶性肿瘤。因此，除了普通X线片外，偶尔可能还需要进一步的检查，包括磁共振（MR）成像。回顾了7例股骨撕脱性皮质不规则的MR图像。在所有病例中，病变在T1加权图像上呈低信号，在T2加权图像上呈高信号，在腓肠肌内侧头骨性附着部位或其附近，两个序列上均有暗边。在所有病例中，普通X线摄影、计算机断层扫描和/或MR成像均显示双侧受累。作者认为，撕脱性皮质不规则累及双侧股骨的频率比之前报道的要高得多。
