Reversible Perfusion Changes during Acute Attacks in Glucose Transporter Type 1 Deficiency Syndrome: A Pediatric Case...

Area of Science:

• Neurology
• Pediatrics
• Medical Imaging

Background:

• Glucose transporter type 1 deficiency syndrome (GLUT1-DS) is an infantile-onset disorder linked to SLC2A1 gene mutations.
• Clinical features include seizures, developmental delay, movement disorders, and stroke-like episodes.
• The underlying pathomechanism of acute transient symptoms in GLUT1-DS remains unclear, with standard MRI often showing nonspecific findings.

Purpose of the Study:

• To investigate the acute pathophysiological changes during stroke-like episodes in pediatric patients with GLUT1-DS.
• To evaluate the utility of arterial spin-labeling (ASL) perfusion imaging and magnetic resonance angiography (MRA) in characterizing these events.

Main Methods:

• ASL perfusion imaging and MRA were performed during acute stroke-like episodes in 4 pediatric patients with GLUT1-DS.
• Imaging findings were analyzed to identify perfusion abnormalities and vascular changes.

Main Results:

• Reversible hypoperfusion was observed in the affected cerebral hemisphere.
• Reversible attenuation of distal Middle Cerebral Artery (MCA) branches was noted on MRA.
• A correlation between unilateral cerebral hypoperfusion and transient crossed cerebellar diaschisis was identified on perfusion maps.

Conclusions:

• ASL and MRA can detect reversible perfusion deficits and vascular changes during acute stroke-like episodes in GLUT1-DS.
• These findings suggest that transient hypoperfusion plays a role in the acute neurological manifestations of GLUT1-DS.
• Advanced imaging techniques offer insights into the poorly understood pathomechanism of acute symptoms in this syndrome.