Sorry about the disorganized cases; I've been traveling in Europe, and internet hasn't been as quick as easy as I hoped.
A basketball player comes in complaining of foot pain that occurred when he landed awkwardly after a jump. A runner has the same complaint when she inverts her ankle running on an uneven surface. Both are worried they sprained their ankle. Their pain is on the lateral edge of their foot. There is focal tenderness, bruising, and swelling at the base of the fifth toe. Both can walk but it's quite painful to do so.
Here is a radiograph:
Challenge: What's the diagnosis?
Image shown under Fair Use.