Abstract: Objective To explore the clinical effect of percutaneous reduction and cannulated screw fixation on the fifth metatarsal base avulsion fractures under ankle nerve block anesthesia. Methods A total of 42 patients with only the fifth metatarsal base avulsion fractures were treated from July 2017 to July 2019. There were 24 males and 18 females with an average age of （36.3±8.9） years （ranged from 24 to 48 years）. All the patients were treated with close reduction and cannulated screw fixation. Results Thirty-six patients were followed up for 22 months in average （ranged from 12 to 36 months）. The wound healed at the first stage without infection. The mean time of fracture union was （10.5±0.3） weeks （ranged from 10 to 12 weeks）. The mean time to start walking with load carriage was 11 weeks （ranged from 10 to 12 weeks）, without obvious pain. At the last follow-up, the mean score of AOFAS Midfoot Scale was 92.4±5.5 （ranged from 86 to 100）. Conclusion The surgery of percutaneous reduction and cannulated screw fixation is simple and minimally invasive for the treatment of the fifth metatarsal base avulsion fractures, which can achieve fast recovery and a satisfactory effect and is an optional surgical method.

Key words: The fifth metatarsal, Fracture, Surgical treatment