<prompt> An ill-defined lesion margin is described as:ScleroticBlendingCorticatedPunched out  <response>: Ill-Defined Borders:Blending Border: A blending border is a gradual, often wide zone of transition between the adjacent normal bone trabeculae and the abnormal-appearing trabeculae of the lesion.Oral radiology White and Pharaoh; 7th ed. Page no 276 