Infant after cardiac surgery on ECMO Pediatric Imaging Neurological March 20, 2020March 10, 2020 Axial and coronal CT without contrast of the brain shows three round mixed density lesions in the cerebellum compressing the fourth ventricle and causing hydrocephalus. The fluid-fluid levels in the lesions were felt to represent active bleeding. The diagnosis was cerebellar hemorrhage on ECMO. Related Published March 20, 2020March 10, 2020