Excision of a lumbar hemivertebra is safe and provides stable correction when combined with a short-segment fusion. Surgery should be performed as early as possible to avert the development of severe local deformities and prevent secondary structural deformities that would require a more extensive fusion later.
Bollini, G., Docquier, P.-L., Viehweger, E., Launay, F., & Jouve, J.-L. (2006). Lumbar hemivertebra resection. The Journal of bone and joint surgery. American volume, 88(5), 1043-1052. https://doi.org/10.2106/JBJS.E.00530 (Original work published 2006)