Fig. 2From: Percutaneous endoscopic-assisted direct repair of pars defect without general anesthesia could be a satisfying treatment alternative for young patient with symptomatic lumbar spondylolysis: a technique note with case seriesAutologous bone was harvested from the posterior superior iliac spine through the subcutaneous tunnel (a, b); Cancellous portion of the bone was compacted into the gap of isthmus (c, d); The final surgical scar of four incisions (e)Back to article page