Fig. 4From: Primary myelofibrosis: spectrum of imaging features and disease-related complicationsAxial CT of the chest demonstrating extramedullary haematopoiesis in the posterior mediastinum, which typically appear as bilateral and symmetrical posterior mediastinal masses (white arrows). In the paravertebral regions, the soft tissue may compress the exiting nerves in the neural exit foramina or enter the vertebral canal, causing cord displacement or compressionBack to article page