Leukodystrophies compass a wide range of genetic disorders that compromise the white matter. Some of them exhibit different phenotypes with late and slow onset. The present work reports an unusual case of probable X-Linked Adrenoleukodystrophy that could be classified in adrenomyeloneupathy, but there were no signs of adrenal insufficiency and the cognitive decline developed fast. MRI evinced classical symmetrical parieto-occipital pattern of lesion, although dosage of very long chain fatty acids was normal.