Teenager with fever, vomiting and headache

CT of pulmonary arteriovenous malformation causing multiple brain abscesses
Axial MRI with contrast of the brain (above) shows multiple ring enhancing lesions in the cerebrum. Axial CT with contrast of the chest (below left) shows multiple necrotic mediastinal lymph nodes. Coronal CT with contrast of the chest (below right) shows a lobulated lesion in the right lower lobe with feeding and draining vessels associated with it.

The diagnosis was multiple cerebral abscesses due to a right lower lobe pulmonary arteriovenous malformation.