This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
Appropriate approach for thyroidectomy to remove thyroid carcinoma with retrosternal extension is 
Select and explain. 
A. Cervical, B. Thorasic, C. Combined cervical and thoracic, D. Thoracoscopic
C: Combined cervical and thoracic
Answer: C: Combined cervical and thoracic 
Explanation: Surgical removal of retrosternal thyroid is done. Commonly, it can be removed through an incision in neck(as blood supply of retrosternal goitre is from neck), but in case of large retrosternal extension or in malignant type median sternotomy is required. Reference: SRB's Manual of Surgery, 6th Edition, page no= 458.