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 True about primary lymphedema: and explain in detail?
Ans is d i.e. Associated with Milroy's disease "The primary lymphedemas are relatively uncommon, occurring in 1 of every 10,000 individuals"-Sabiston "Lymphangiosarcoma is a rare tumor that develops as a complication of long-standing (usually more than 10 years) lymphedema."- Sabiston "Cutaneous lymphangiosarcoma may develop in chronically lymphedematous extremities."- Devita 8/e Chapter 45