In consultation with the tumour surgeon, a route was chosen to transverse the extensor digitorum longus muscle. A Bonopty® kit was used, intravenous sedation, and local anaesthesia. Two passes traversing the centre of the lesion into the medulla on the other side. Bone and soft tissue cores in contiguity were obtained, placed in formalin. Biopsy track marked with sterile carbon up to the skin.