Post-laminectomy kyphosis. 
Post-laminectomy spinal deformity occurs in 50% of children undergoing laminectomies for cord tumors.  Kyphosis is the most frequent deformity found.  The integrity of the facet joints appears to be one of the most important factors in the development of this kyphosis.  More children are surviving after treatment of these tumors and a pessimistic attitude is not warranted.  Observation of a progressing deformity is not acceptable treatment.  When kyphosis develops, early prompt bracing must be started.  For a progressive or severe kyphosis, an anterior spine fusion is indicated.  This is reinforced by a posterior fusion with Harrington instrumentation.  Surgical reconstruction is indicated in children recovering from extensive laminectomies but with a good prognosis.