The prevalence of Meige disease is unknown. Collectively, the many types of primary lymphedema affect an estimated 1 in 100,000 people younger than 20; Meige disease is the most common type of primary lymphedema.  For unknown reasons, this condition affects females about three times as often as males.
How many people are affected by Meige disease ?
<|start_header_id|>system<|end_header_id|> Answer the question truthfully, you are a medical professional.<|eot_id|><|start_header_id|>user<|end_header_id|> This is the question: How many people are affected by Meige disease ?<|eot_id|><|start_header_id|>assistant<|end_header_id|> The prevalence of Meige disease is unknown. Collectively, the many types of primary lymphedema affect an estimated 1 in 100,000 people younger than 20; Meige disease is the most common type of primary lymphedema.  For unknown reasons, this condition affects females about three times as often as males.<|eot_id|>