This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Orthopaedics
Patient had an injury to thumb causing thumb abduction. Which of the following can happen? 
Select and explain. 
A. Game keepers thumb, B. Bohlers thumb, C. Kaplan injury, D. Mallet finger
A: Game keepers thumb
Answer: A: Game keepers thumb 
Explanation: Thumb abduction leads to ulnar collateral ligament damage. It is the most common injury of metacarpal phalangeal joint. Game keeper's thumb occurs due to forceful abduction of thumb. Mallet finger involves DIP of fingers and occurs due to hyperextension. Kaplan injury occurs in 2nd MCP joint as it is a flexion injury. Bowler's thumb occurs in bowling and there is nerve involvement.