Disease from surrounding structures can invade the masticator space via the pterygopalatine fossa, the buccal space immediately anterior to the ramus, the foramen ovale, or by way of direct invasion.

• 咀嚼肌间隙临近的病变可循翼腭窝、颊间隙、上颌窦、卵圆孔等途径侵及咀嚼肌间隙。