Adrenomyeloneuropathy in patients with 'Addison's disease': genetic case analysis.

OBJECTIVE

To review the clinical presentations and diagnostic issues in adrenomyeloneuropathy and adrenoleukodystrophy, which are different presentations of the same single gene disorder.

DESIGN

Observational study.

PARTICIPANTS

Three generations of an affected kindred.

INTERVENTION: None.

MAIN OUTCOME MEASURES: Neurological features suggestive of adrenoleukodystrophy or adrenomyeloneuropathy. Measurement of very long chain fatty acids. Molecular analysis of the adrenoleukodystrophy gene.

RESULTS

Three adults presented with adrenomyeloneuropathy and two children with adrenoleukodystrophy. Circulating concentrations of long chain fatty acids were raised consistent with clinical features. A mutation in exon 6 of the adrenoleukodystrophy gene (P543L) was identified. This had not previously been identified but has subsequently been reported by other groups.

CONCLUSIONS

Adrenomyeloneuropathy should be considered in the differential diagnosis in male patients presenting with adrenal failure. Early diagnosis allows genetic counselling in such families and may become more important as treatment strategies evolve.