Quiescent Andersson Lesion Simplifies Deformity Correction: A Case Report.

Case: We present a case of ankylosing spondylitis with sagittal imbalance and having a suspicious Andersson lesion (AL) on magnetic resonance imaging (MRI) at D12-L1. The segment did not reveal any potential mobility on erect radiographs and supine MRI. L2 pedicle subtraction osteotomy was planned.