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Familial adrenocortical hypoplasia with early clinical and biochemical signs of mineralocorticoid deficiency (hypoaldosteronism).

Biochemical investigations in a boy with a salt losing syndrome revealed a very low secretion of aldosterone which did not rise during salt deprivation, in spite of a normal rise in plasma renin activity. Cortisol secretion was normal - but subsequently decreased, while the corticosterone secretion was high. The patient was studied at the age of 5 weeks, 3 months and also at the age of 8 months. He survived until the age of 18 months on treatment with sodium chloride and DOCA, but did not receive glucocorticoids. At autopsy the adrenal glands were absent, but in fat tissue from the upper renal poles foetal adrenal cortex tissue was found. The histological picture agrees well with other cases which could be designated as "foetal-cortex-only" adrenal hypoplasia. The same histological changes were demonstrated in the boy's brother who died suddenly at the age of 6 weeks. The boy's testes were advanced in maturation to a stage of about ten years: spermatocytes and Leydig cells were present.