Rodríguez-Peralto J L, López-Barea F, Sánchez-Herrera S, Atienza M
Department of Pathology, Hospital 12 de Octubre, Madrid, Spain.
Am J Surg Pathol. 1994 Jun;18(6):632-6. doi: 10.1097/00000478-199406000-00007.
In this report we describe a soft-tissue aneurysmal cyst located in the left shoulder of a 20-year-old woman. Although the tumor initially was clinically considered a myositis ossificans, the microscopic features were identical to those found in classic aneurysmal bone cyst (ABC). Light microscopy showed a lesion composed of a peripheral band of mature trabecular bone surrounding a multicystic central area made up of anastomosing cavernous blood channels separated by fibrous septa that contained osteoid, mineralized myxochondroid material and osteoclastic giant cells. Whereas most bone tumors have an extraosseous counterpart, ABC has been found outside the bone only once, in an artery, but never in soft tissues. Moreover, major reviews state that aneurysmal bone cyst occurs exclusively within bones. This unique case is a very rare occurrence of one of these lesions in the soft tissues.
在本报告中，我们描述了一名20岁女性左肩部的软组织动脉瘤样骨囊肿。尽管该肿瘤最初在临床上被认为是骨化性肌炎，但其微观特征与经典动脉瘤样骨囊肿（ABC）中发现的特征相同。光镜检查显示，病变由成熟小梁骨的外周带组成，围绕着一个多囊性中心区域，该区域由相互吻合的海绵状血窦组成，血窦被纤维间隔分隔，纤维间隔内含有类骨质、矿化的黏液软骨样物质和破骨巨细胞。虽然大多数骨肿瘤都有骨外对应物，但ABC仅在动脉中被发现过一次位于骨外，从未在软组织中发现过。此外，主要综述指出动脉瘤样骨囊肿仅发生于骨内。这一独特病例是这些病变之一在软组织中极为罕见的情况。
