Brain Magnetic Resonance Imaging of Children With Molybdenum Cofactor Deficiency

Area of Science:

• Neurology
• Radiology
• Biochemistry

Background:

• Molybdenum cofactor deficiency (MoCD) is a rare condition mimicking neonatal hypoxic ischemic encephalopathy (HIE).
• The neuroimaging characteristics and temporospatial evolution of brain MRI findings in MoCD are not well-documented.
• Understanding these patterns is crucial for accurate diagnosis and prognosis.

Purpose of the Study:

• To systematically evaluate brain MRI findings in neonatal MoCD.
• To characterize acute and chronic brain abnormalities due to sulfite toxicity.
• To assess treatment response to 4-phenylbutyrate (cPMP) in MoCD type A.

Main Methods:

• Retrospective analysis of 35 brain MRI scans from 13 neonates with MoCD (7 type A, 6 type B).
• Evaluation of MRI features associated with sulfite accumulation.
• Longitudinal assessment of treatment effects in 6 MoCD type A patients receiving cPMP.

Main Results:

• A distinct pattern of acute and chronic brain injury in MoCD, differing from HIE.
• White matter edema identified as an early, potentially reversible sign of sulfite toxicity.
• Restricted diffusion indicates irreversible brain injury and poor prognosis, regardless of cPMP treatment.

Conclusions:

• Neuroimaging reveals specific diagnostic and prognostic markers for MoCD.
• MRI findings can guide treatment decisions and evaluate therapeutic efficacy.
• This study provides the largest neuroimaging dataset and first longitudinal MRI analysis for MoCD.