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Severe neonatal hypernatremia is an important electrolyte disorder that has serious effects. Cerebral venous thrombosis and aortic thrombosis are relatively rare in severe neonatal hypernatremic dehydration. The authors report a case of cerebral venous thrombosis, associated with aortic thrombosis revealed by dehydration in a 9-day-old boy. Diagnostic was performed using Doppler ultrasound and imaging techniques. Thrombosis was resolved after anticoagulation treatment with low-molecular weight heparin for 1 month, and then was substituted by oral anticoagulant. The case report is followed by a review of the literature dealing with clinical, aetiological and therapeutic aspects of neonatal thrombosis.

The authors report a case of intracerebellar haematoma occurring during the neonatal period. A 5-day-old baby girl was admitted because of poor feeding and the anterior fontanelle was tense. CT scan of the brain revealed a round mass at the cerebellar vermis; the lesion simulated a cerebellar tumour such as a medulloblastoma. The mass was surgically removed and found to be an intracerebellar haematoma. The clinical and radiologic characteristics are discussed.