Abstract:[Objective] To compare the clinical outcomes of supramolleolar osteotomy with or without fibular osteotomy for correction of ankle varus deformity in adolescents. [Methods] A retrospective study was conducted on 29 adolescent patients (29 feet) who received supra- molleolar osteotomy for correction of ankle varus deformity in our department from January 2010 to December 2019. According to the preop- erative doctor-patient communication, the patients were divided into two groups, including 18 patients who maintained fibula intact (FI) , while 11 patients who underwent fibular osteotomy (FO) simultaneously. The perioperative period, follow- up and imaging data of the two groups were compared. [Results] All the patients in both groups had operation performed successfully without serious complications. The FI group proved significantly superior to the FO group in terms of operation time and total incision length (P<0.05) , though there were no signifi- cant differences in intraoperative blood loss, intraoperative fluoroscopy times, postoperative drainage volume, incision healing grade and hos- pital stay between the two groups (P>0.05) . All the patients in both groups were followed up for (49.72±19.44) months on a mean. The FI group resumed walking and full weight-bearing activity significantly earlier than the FO group (P<0.05) . The AOFAS ankle and hindfoot scores significantly increased (P<0.05) , while the VAS scores significantly decreased (P<0.05) , and the ankle dorsal extension and plantar flexion range of motion (ROM) remained unchanged in both groups at the latest follow- up compared with those preoperatively (P>0.05) , which proved not statistically significant at any matching time points between the two groups (P>0.05) . Radiographically, all patients got os- teotomy healed at latest follow-up without a significant difference in healing time between the two groups (P>0.05) . The tibial articular sur- face angle (TAS) , tibial lateral surface angle (TLS) and tibiocrural angle (TC) significantly improved (P<0.05) , whereas the talar tilt angle (TT) remained unchanged postoperatively compared with those preoperatively in both groups (P>0.05) . The FO group proved significantly superior to the FI group in term of TC immediately after operation and at the latest follow-up (P<0.05) . [Conclusion] Supramolleolar osteot- omies with both FI and FO are effective correction of ankle varus deformity. The FI is superior to the FO in terms of operation time, incision length, times to resume walking and full weight-bearing activity, while the FO is superior to the FI in term of correction of TC.