Important to distinguish tenderness at base of 1st MC from injury to scaphoid, trapezium, or distal radius
If pain or ecchymosis occurs more distally at the MCP (particularly on the ulnar side) consider ulnar collateral ligament injury (Gamekeeper's Thumb)
Thumb fracture
Non-thumb metacarpal fractures
Tibial spine fracture 
Head
Tibia fracture 
Neck
Trapezium fracture
Shaft