Table 1.

Clinical forms of X-ALD.

Phenotype	Ratio (%)	Age of onset
Cerebral ALD
Childhood cerebral ALD	~38	3–10
Adolescent cerebral ALD	~7	11–21
Adult cerebral ALD	~5	21~
Adrenomyeloneuropathy (AMN)	~50	20–30
Addison's only