This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
Cold abscess in chest wall is most common due to - 
Select and explain. 
A. T.B spine, B. T.B rib, C. T.B. pelvis, D. T.B pleura
A: T.B spine
Answer: A: T.B spine 
Explanation: It is a straight-forward question.
Most common site of skeletal TB is spine, and pus from the Dorsal spine can travel along intercostal neurovascular bundle in the intercostal space in chest wall to form a cold abscess.