Kate likes to tell everyone about her port. She'll go up to complete strangers and ask them if they want to feel her port. It is kind of a sensitive spot and she tells people to "be gentle". Still, many of our friends and family don't know what exactly the port is. Here are a few pictures that help I think.
The one on the left was taken a couple of weeks ago when they were looking for pneumonia. The port is the round circle on the upper right chest wall. You can notice the white tubing going up and over to the left. It enters directly into the heart.
The picture of Kate on the right shows a surgical scar above a little bluish bubble. That bubble is the round port. This is where they put a needle through each week for blood draws and chemotherapy.
If you see Kate, you can ask her to feel the port (if she doesn't ask you first). It is pretty cool.