“…9,10,33,34,39 My view is that bony and mixed replacement of the intervertebral space are not always synonymous with clinical healing, and that anterior radical surgery in adults to obtain cure through intercorporeal fusion is not justified in every case, because spontaneous fusion can be obtained by modern chemotherapy alone, and that cure can be also obtained without fusion. 6,8,21,27,30,39 Fusion is desirable, but is not essential for every patient. 22,35 In particular 'block spine' after anterior fusion in children is not desirable, as it accelerates the tuberculous kyphosis during growth.…”