Periventricular low attenuations: a normal finding in computerized tomographic scans of neonates?

Area of Science:

• Neonatal imaging
• Neurology
• Radiology

Background:

• Neonatal brain abnormalities on CT scans require careful interpretation.
• Periventricular leukomalacia is a significant concern in neonates.

Purpose of the Study:

• To evaluate the significance of periventricular low attenuations on neonatal CT scans.
• To determine if these findings are indicative of periventricular leukomalacia or transient abnormalities.

Main Methods:

• Reviewed initial CT scans of 63 neonates.
• Identified and categorized abnormalities, focusing on periventricular low attenuations.
• Conducted follow-up clinical studies and repeat CT scans on a subset of infants.

Main Results:

• Twenty-five neonates had definite abnormalities including hemorrhage and dilated ventricles.
• Thirty-six neonates showed localized periventricular low attenuations, previously associated with periventricular leukomalacia.
• Follow-up revealed only two of 26 infants with neurological abnormalities; one case showed transient attenuation resolving into mild atrophy.

Conclusions:

• Periventricular low attenuations on neonatal CT scans are often transient or due to incomplete myelination.
• These findings are not a reliable diagnostic sign of periventricular leukomalacia.
• Periventricular low attenuations do not necessarily indicate an unfavorable prognosis.