Okada K, Masuda H, Shozawa T, Arai M
Second Department of Pathology, Akita University School of Medicine, Japan.
Acta Pathol Jpn. 1989 Aug;39(8):539-44. doi: 10.1111/j.1440-1827.1989.tb01521.x.
We report a 16-year-old Japanese girl with a cystic lesion restricted to the cortical bone under the periosteum of the diaphysis of the left femur. Roentgenograms showed a long, oval translucent lesion in frontal view and an eccentric erosive lesion in lateral view. Computed tomography showed a distinct intracortical lesion. The lesion, which was excised en bloc, measured 3 x 2 x 2 cm. The outer layer of the cortical bone was eroded eccentrically. From the margin of the eroded bone, thin fragile bony tissue and preserved periosteum extended like the roof of a dome. Multicystic structures, filled with blood, were lined with fibrous granulation and occasional giant cells. Histologically, this lesion falls within the category of aneurysmal bone cyst. However this case is of a rare type, since the lesion was relatively small, and showed a very specific intracortical location, in marked contrast to typical aneurysmal bone cyst. Additionally, this lesion is similar to so-called subperiosteal giant cell tumor or subperiosteal osteoclasia described in the literature.
我们报告一名16岁的日本女孩，其左股骨干骨膜下的皮质骨有一个囊性病变。X线片在正位片上显示为一个长椭圆形的透光区，侧位片上显示为偏心性侵蚀性病变。计算机断层扫描显示一个明显的皮质内病变。整块切除的病变大小为3×2×2厘米。皮质骨外层有偏心性侵蚀。从侵蚀骨的边缘，薄而脆弱的骨组织和保留的骨膜像穹顶的屋顶一样延伸。充满血液的多囊结构内衬纤维肉芽组织，偶尔可见巨细胞。组织学上，该病变属于动脉瘤样骨囊肿范畴。然而，此病例为罕见类型，因为病变相对较小，且显示出非常特殊的皮质内位置，这与典型的动脉瘤样骨囊肿形成明显对比。此外，该病变类似于文献中描述的所谓骨膜下巨细胞瘤或骨膜下骨质溶解。
