Bilateral osteotomy is when an osteotomy is performed on both limbs.
Simultaneous bilateral osteotomy
When there is extreme bowing, or if the patient is in a hurry, the two legs may be operated on at the same time - which is called a simultaneous bilateral osteotomy. Usually, however, the patient is allowed to recover from the one surgery before the other side is one.
Simultaneous bilateral opening-wedge high tibial osteotomy with early full weight-bearing exercise. Takeuchi R, Aratake M, Bito H, Saito I, Kumagai K, Ishikawa H, Akamatsu Y, Sasaki Y and Saito T. Knee Surg Sports Traumatol Arthrosc. 2008 Nov;16(11):1030-7. doi: 10.1007/s00167-008-0609-8. Epub 2008 Sep 2.
Bilateral double osteotomy in severe torsional malalignment syndrome: 16 years follow-up. Leonardi F, Rivera F, Zorzan A and Ali SM. J Orthop Traumatol. 2014 Jun; 15(2): 131–136.