病变可见多个充满血湖的囊腔,囊腔之间为富于细胞的间隔
囊腔无内皮细胞覆盖,囊腔之间为致密的梭形纤维母细胞样细胞及散在分布的破骨样巨细胞
囊腔之间可见化生性骨和骨样基质形成。
囊腔间隔内可见致密的梭形细胞伴成熟的骨样基质、含铁血黄素以及破骨样巨细胞沉积
免疫组化染色间隔的肿瘤细胞H3F3A G34W表达阴性
骨化性肌炎:病变较短,组织学上存在明显的区带分布,无充满血湖的囊腔形成;
骨外毛细血管扩张性骨肉瘤:病变细胞具有明显的异型性和多形性以及非典型核分裂象,不成熟的骨样基质等可资鉴别。
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Soft tissue aneurysmal bone cyst: six new cases with imaging details, molecular pathology, and review of the literature.
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Jacquot C, Szymanska J, Nemana LJ, Steinbach LS, Horvai AE. Soft-tissue aneurysmal bone cyst wi th translocat ion
t(17;17)(p13;q21) corresponding to COL1A1 and USP6 loci. Skelet Radiol. 2015;44:1695–9.