Endocrine

Conn's Syndrome

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Pathology

Excess aldosterone production from the adrenal cortex (primary)

Aetiology

Adrenocortical adenoma (60%): F>>M. 3-5th Decade 
Idiopathic/hyperplasia (40%): M=F, 5-7th decade
Adrenal Ca: older group, F>M

Signs

Moderate signs of hypertension

Symptoms

Usually related to hypertension. Rarely myopathy, weakness, polyuria/polydipsia due to kidneys being unable to concentrate urine

Investigations

Bloods: FBC, U&E, Aldosterone (elevated), plasma renin, (>30-50ng/ml/h). 
Imaging: CT/MRI to identify adenomas if biochemical tests suspicious 

Treatment

Medical: Aldosterone antagonists e.g. Spironolactone or Eplerenone   
Surgical: Resection

Prognosis

Adrenalectomy can cure ~ 75% of cases
All associated with poorly treated hypertension 

Key Facts

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Key References

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