9.脊椎轉移性腫瘤中最常轉移的位置為:
(A)頸椎
(B)胸椎
(C)腰椎
(D)薦椎
ESCC most commonly arises in the thoracic spine. Approximately 60 to 70 percent of cases occur in the thoracic spine, 20 to 30 percent in the lumbosacral spine, and 10 percent in the cervical spine. These percentages are in rough proportion to the combined volumes of the vertebral bodies in each region.