Salvaging the Unsalvageable Giant Cell Tumors of Bone: The 'Longitudinal Sandwich Technique'.

Management of Campanacci Grade III Giant Cell Tumors of bone (GCT) is challenging. Although selected cases of Grade III GCTs can still be managed with intralesional extended curettage, wide excision of the lesion is usually recommended when there is extensive cortical destruction. This study describes the outcome of 'longitudinal sandwich technique' for extended curettage of Grade III GCTs with more than 50% cortical destruction. Here, the deficiency of cortex was made up for by using bone graft/graft substitute, used alongside cement placed in a longitudinal fashion. Twelve patients operated with this technique between Jan 2012 and Jan 2018 were reviewed. Majority of the lesions involved the lower limbs. Bone graft was used in eight whereas commercial bone graft substitute was used in the remaining four, along with bone cement in all. On follow-up ranging from 38 to 84 months (median follow-up 59 months), there were 4 local recurrences (33.33%). All recurrences were managed successfully with repeat surgery without the need for bony resection. Mean MSTS score during the last follow-up was 25.08 ± 2.31 and all patients were disease-free during the last follow-up. 'Longitudinal sandwich technique' helps to expand the indications of extended curettage even for aggressive Grade III GCTs, with satisfactory outcomes.