|Acute penetrating trauma from a close-range shotgun blast injury to knee. Birdshot pellets are visible in the wound, within the shattered patella. The powder wad from the shotgun shell has been extracted from the wound, and is visible at the upper right of the image.|
|Specialty||Trauma surgery, General surgery, emergency medicine|
The penetrating object may remain in the tissues, come back out the way it entered, or pass through the tissues and exit from another area.
An injury in which an object enters the body or a structure and passes all the way through is called a perforating injury, while penetrating trauma implies that the object does not pass through.