Thankfully malignant tumours around the knee are very rare. Bone tumours occur mostly in people under the age of 20 and tumours of muscle occur mostly in middle aged people. Rarely secondary tumours from other tumours such as breast, thyroid, kidney, prostate and lung cancer can grow in the bones around the knee. These secondary tumours are most common in elderly patients.
The treatment of any tumour in bone or muscle is performed in regional centres due to the rarity of the condititon.