Through repeated practice of the body scan over time, we come to grasp the reality of our body [and our Self] as whole in the present moment. This feeling of wholeness can be experienced no matter what is wrong with [our] body. One part of [our] body, or many parts of [our] bod, may be dis-eased or [experiencing] pain or even missing, yet [we] can still cradle them in this experience of wholeness.
Enjoy your practice :-)