Biopsy is a crucial step in the management of musculoskeletal sarcoma. The surgical approach to the biopsy site is important. as the tract must be removed en bloc with the tumour during limb sparing surgery so as to reduce the risk of local recurrence. The biopsy tracts of 26 osteosarcoma patients were evaluated histologically for tumour infiltration. https://fitnessgravesyardes.shop/product-category/encoder/