“…The noninfiltrating type is more common, usually well encapsulated and demarcated, while the infiltrating types are rare, partially or entirely unencapsulated, ill defined, and commonly infiltrate the surrounding tissues especially the bone [13], therefore should be considered and treated differently [14]. However, in recent years, some researchers indicated most patients achieved good recovery and there is no difference in the outcomes of the two types [15]. All 3 cases in this report can be categorized into the none-infiltrating type as they showed clear demarcation and no invasion to the bone.…”