<prompt> Which of the statements is not true regarding Macleods SyndromeIt is not a true emphysemaOccurs before 8 years of ageIt is unilateral emphysemaThe pulmonary artery on the affected side is hyperplastic  <response>: Macleod syndrome It is also known as Swyer - Janes syndromeIt is a cause of unilateral hyperlucent lung.It may present as acute pneumonia, but most patients are discovered when a chest X-ray is obtained for an unrelated reason.This not a true emphysema.On examination there is hyperresonance and a small lung with mediastinum shifted towards the more abnormal lung.There is no vascular abnormality.No specific treatment is required, it may become less symptomatic with time. 