You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is According to the Enneking system, not true regarding an active benign tumour is - and explain in detail?
Enneking active stage of benign tumors is stage 2 in which tumor is actively growing and can cause symptoms of pathological fracture.
Radiograph shows well defined margins with a thin rim of reactive bone. Tumor may expand and thin the cortex.
Treatment usually consists of extended curettage, e.g. in ABC.