This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tuberculosis of Bone & Joints, Subject name: Orthopaedics
Caries sicca refer to - 
Select and explain. 
A. Tuberculosis of shoulder, B. Tuberculosis of wrist, C. Tuberculosis of ankle, D. Tuberculosis of calcaneum
A: Tuberculosis of shoulder
Answer: A: Tuberculosis of shoulder 
Explanation: Ans. is 'a' i.e., Tuberculosis of shoulder Tuberculosis of shoulder:* Tuberculosis of the shoulder is uncommon.* It usually starts as an osteitis but is rarely diagnosed until arthritis has supervened. This may proceed to abscess and sinus formation, but in some cases the tendency is to fibrosis and ankylosis.* If there is no exudate the term 'caries sicca' is used.* They may be confused with frozen shoulder clinically.