Trapdoor technique for intralesional excision of chondroblastoma of proximal humerus

Chondroblastoma is a rare benign cartilaginous tumour affecting the epiphysis of long bones. Curettage and bone grafting constitute the primary treatment of choice, but localising the tumour intra-operatively may be a daunting task, in spite using an image intensifier. We describe a novel technique to localize the sub chondral tumour intra-operatively using a Kirschner (K) wire and to treat the same employing a trap-door technique in a case of chondroblastoma of proximal humerus, which was completely missed during a previous attempted curettage. Our technique is simple and effective and easily reproducible. To the best of our knowledge this technique has not been described in the literature for the treatment of chondroblastoma of proximal humerus.