Index of suspicion. Case 2. Diagnosis: Addison disease.
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UNLABELLED: We report a 10-year-old boy with familial Wiskott-Aldrich syndrome (WAS) who underwent successful bone marrow transplantation (BMT) at the age of 9 months. With the exception of auto-immune haemolytic anaemia due to warm antibodies lasting 15 months there had not been any complication after BMT. Ten years later the patient presented with diarrhoea, hyperpigmentation of skin and oral mucosa, fatigue and polyuria. Diagnosis of Addison disease was confirmed by typical electrolyte imbalance and absent cortisol response to adrenocorticotrophic hormone. Adrenal antibodies were positive. On therapy with oral gluco- and mineralocorticoids, the symptoms disappeared and electrolytes normalized. To our knowledge auto-immuno endocrinopathy after BMT for WAS has not yet been reported. CONCLUSION: This is the first report of auto-immune adrenal insufficiency after BMT for WAS. The aetiopathogenesis of this condition remains unknown since auto-immune diseases as toxic side-effects of the ablative treatment before BMT have not yet been reported, and a relapse of WAS and cotransplantation of auto-immune adrenal insufficiency have been ruled out.
Stored sera from 466 patients with insulin-dependent diabetes mellitus and from 144 controls were examined for organ-specific antibodies to human adrenal cortex. Adrenal antibodies were found in seven of the patients with IDDM (1.5%) and in one control (0.7%). None of 91 black patients with IDDM had adrenal antibodies. All of the seven patients with adrenal antibodies had other organ-specific antibodies. Three had clinical hypothyroidism and one was thyrotoxic. All of these seven patients had a HLA-B8-bearing haplotype, suggesting that the B8-bearing haplotype confers an extremely high "relative risk" for adrenal autoimmunity in IDDM. Organ-specific autoimmune disease and/or organ-specific antibodies were found in 30% of the first-degree relatives of these eight probands with the adrenal antibodies (seven with IDDM and one control). We conclude that screening patients with IDDM for adrenal antibodies of low yield (1.9% among white patients). Further, adrenal antibodies may be present for at least two years without the development of Addison disease. Antibodies reactive only to the zona glomerulosa of the adrenal cortex may be benign. Patients with IDDM and thyroid microsomal antibodies are more likely to have adrenal antibodies (6.5%), as are patients with IDDM and a B8-bearing haplotype and those with IDDM and family histories of organ-specific autoimmunity.
Addison's disease is an uncommon but potentially life-threatening condition characterized by adrenal failure. All patients require lifelong glucocorticoid replacement to maintain life and most also need aldosterone substitution. There has been some recent interest in the physiological role in humans of the adrenal androgen, dehydroepiandrosterone. This paper reviews optimal glucocorticoid and mineralo-corticoid replacement therapy and provides the available data on dehydroepiandrosterone replacement.
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