Extramedullary haematopoiesis - thalassaemia
Chest pain and left sided pleural effusion.
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There is marked medullary expansion of all bones suggesting that the multiple posterior mediastinal masses represent extramedullary haematopoiesis. This patient had known thalassaemia as the cause. The region of consolidation in the left lower lobe and left pleural effusion most likely account for the patient's chest pain.