Spectrum of Clinical and Imaging Characteristics of 48 X-Linked Adrenoleukodystrophy Patients: Our Experience from a University Hospital.

Abstract

X-linked adrenoleukodystrophy (X-ALD) occurs due to the mutation in the ABCD1-gene. Our study was to correlate the clinical, radiological, and biochemical features in a cohort of X-ALD patients. We retrospectively analyzed 48 (M: F: 47:1) biochemically confirmed cases of X-ALD, classified them as cerebral ALD (childhood, adolescent, and adult), adrenomyeloneuropathy, Addisonian only. The Magnetic Resonance Imaging (MRI) of the radiological patterns was classified based on Loes classification. The various clinical phenotypes were childhood cerebral X-ALD (58.3%), adolescent cerebral X-ALD (14.6%), adult-cerebral X-ALD (20.8%), Addisonian variant (4.2%), and adrenomyeloneuropathy (AMN) (2.1%). The imaging features were posterior white matter (Pattern-1) observed in 33 (68.75%) patients, cerebellar white matter (Pattern-4) noted in 5 subjects, anterior white matter (Pattern-2) observed in 3 patients, combined parieto-occipital and frontal white matter (Pattern-5) observed in 3 patients, isolated projection fiber (Pattern-3) observed in 1 patient. Rare features of the involvement of optic tract, anterior and lateral columns of cervicodorsal cord, bilateral central tegmental tracts, basal ganglia, and tigroid appearance were observed. This is a comprehensive clinical, biochemical, and imaging analysis with follow-up information of one of the largest series of X-ALD patients. The knowledge regarding the clinical features, typical and atypical imaging patterns is of vital importance for early diagnosis and treatment.