What The Heck? Chest CT

Here’s another one for you to figure out. Of course, I’ll give you minimal information and see what you can do with it.

A middle-aged male presents to your ED from home with left chest pain and weakness. There is a history of a motorcycle crash 6 weeks ago. Ultimately, a chest CT was obtained and here is a representative section:

Here are my questions:

What’s going on?

Why?

What should you do about it?

Leave a comment below or tweet your guesses. Answers tomorrow!