A 45-Year-Old Man with Thumb Pain After a Fall

The patient is a 45-year-old man who presents as your first patient of the day, with thumb pain after taking a fall in the middle of the night. He tripped walking to the bathroom and tried to catch himself on the doorknob as he went down. His pain worsens with movement or when he tries to grip anything.            

View the image taken and consider what your diagnosis and next steps would be.