MR imaging of adrenoleukodystrophy.

Area of Science:

• Neurology
• Radiology
• Genetics

Background:

• Adrenoleukodystrophy (ALD) is a rare genetic disorder affecting the adrenal glands and nervous system.
• ALD presents with diverse clinical manifestations, including childhood cerebral ALD and adult-onset adrenomyeloneuropathy (AMN).
• Understanding the neuroimaging characteristics of different ALD subtypes is crucial for diagnosis and prognosis.

Purpose of the Study:

• To investigate and characterize the Magnetic Resonance Imaging (MRI) findings in various forms of adrenoleukodystrophy (ALD).
• To identify potential early imaging markers for adult-onset ALD, including adrenomyeloneuropathy (AMN).

Main Methods:

• Performed MRI on 7 patients with ALD: 3 with childhood ALD, 3 with AMN, and 1 symptomatic heterozygote.
• Utilized high-field-strength (2.0T) MRI in two childhood ALD cases.
• Analyzed lesion distribution and characteristics across different ALD subtypes.

Main Results:

• Childhood ALD cases (n=3) exhibited widespread cerebral hemisphere lesions.
• Two childhood ALD cases showed low-intensity areas in the diencephalon or striatum on heavily T2-weighted 2.0T MRI.
• Cerebral lesions confined to the internal capsule, cerebral peduncle, and optic radiation were observed in adult-onset ALD (AMN and heterozygote) and may represent an early disease stage.

Conclusions:

• MRI findings differ significantly between childhood ALD and adult-onset forms like AMN.
• The specific pattern of cerebral lesions in adult-onset ALD may serve as an indicator of early disease progression.
• Further research is warranted to validate these imaging findings for early ALD detection and management.