Conversation: The conversation between human and AI assistant.
[|Human|] My 90 year old uncle and fallen and fractured the tibia and fibula. He also has advanced prostrate ca which is not being treated. He had surgery on the leg and it is casted . Now I m worried about poor circulation and infection. Is bone cancer a common complication of prostrate cancer?
[|AI|]  Thanks for your question on Chat Doctor. Prostate cancer can commonly metastasize to bones especially thoracic vertebrae and long bones like femur, tibia, humerus etc. Metastases from prostate causes osteoblastic secondaries in bones. This makes bone weaker. They cause osteoporosis and demineralization of bone. So bones become highly fragile and prone to fracture. Even slightest force can cause fracture. Bone metastases are very common after untreated prostate cancer.