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Updated: Jun 23, 2026

State of the Art Cranial Ultrasound Imaging in Neonates
Published on: February 2, 2015
Neonatal ruptured intracranial aneurysms: case report and literature review
Y Van Raay1, S Darteyre, F Di Rocco
1Department of Paediatric Neurosurgery, Hôpital Necker Enfants-Malades, 149 rue de Sèvres, Paris 75015, France.
Insights
Neonatal intracranial aneurysms are rare, with this study detailing the first posterior inferior cerebellar artery (PICA) aneurysm case. Early diagnosis and treatment of these rare PICA aneurysms are crucial for better outcomes in infants.
Area of Science:
- Neuroscience
- Pediatric Neurology
- Vascular Surgery
Background:
- Intracranial aneurysms are exceedingly rare in neonates, with only 16 prior reported cases.
- This report details the first documented case of a neonatal posterior inferior cerebellar artery (PICA) aneurysm.
Observation:
- A 7-day-old infant presented with non-specific symptoms including irritability, anorexia, fever, and rapid head growth.
- Imaging revealed intraventricular hemorrhage, hydrocephalus, and a pontine cistern hematoma, with a suspected PICA aneurysm confirmed by angiography.
Findings:
- The infant underwent successful surgical clipping and aneurysm excision.
- Histopathology showed a calcified arterial wall with thrombosis and absence of the internal elastic lamina, suggesting a congenital origin.
Implications:
- Neonatal intracranial aneurysms often present with nonspecific symptoms, necessitating prompt diagnostic evaluation.
- Posterior circulation and large aneurysms are more common in neonates; early intervention improves outcomes, and surgery is generally well-tolerated.
- Recommended diagnostic pathway includes cranial ultrasound, MR angiography, and CT angiography if needed.
Introduction:
Intracranial aneurysms are exceptional in neonatal patients: There are only 16 cases previously reported. We describe the first case of neonatal posterior inferior cerebellar artery (PICA) aneurysm and review the literature.
Case Report:
A 7-day-old girl presented with irritability, anorexia, fever and abnormally enlarging head circumference. Computed tomography (CT) and magnetic resonance (MR) imaging demonstrated intraventricular haemorrhage, secondary hydrocephalus and a pontine cistern haematoma. A PICA aneurysm was suspected on the CT angiogram (CTA) and the diagnosis was confirmed by conventional cerebral angiography. She was successfully treated by surgical clipping of the parent vessel and excision of the aneurysm. Postoperatively, she experienced transient swallowing difficulties and required a ventriculo-peritoneal shunt for hydrocephalus. Histopathological evaluation demonstrated a calcified arterial wall with thrombosis, signs of prior haemorrhage and the absence of the internal elastic lamina.
Conclusion:
Neonatal intracranial aneurysms are rare. Clinical presentation of subarachnoid haemorrhage in this age group is often non-specific. First-line investigation should start with transfontanelle cranial ultrasound, followed by MR angiography then CTA if necessary. Posterior circulation aneurysms and large or giant aneurysms are more frequent in neonates and children than in adults. Early diagnosis and treatment are important for improved outcome. Surgery is better tolerated than in adults.
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