The location, the histopathologic and immunohistochemical appearance of the tumor, and the time elapsed since the initial treatment make it probable that this tumor is associated with prior radiation treatment.

• 由其肿瘤位置、组织病理及免疫组织化学表现、最初治疗结束至发病时间间隔等特性分析，此恶性纤维组织细胞瘤可能与先前之放射治疗有密切关系。