Sliding-layer sign on dynamic dermoscopy for pilomatricoma

The sliding-layer sign is a dynamic dermoscopic finding in which the epidermis glides over the dermal and subepidermal tissues when gentle pressure and slight rotational movements are applied with the dermatoscope.

滑动层征（sliding-layer sign）是一种动态皮肤镜体征，指使用皮肤镜（dermatoscope）施加轻柔压力并辅以轻微旋转动作时，表皮（epidermis）可在真皮及表皮下组织表面滑动。