Q:

A 60 year old woman has tiredness. She has noticed that her skin looks permenantly tanned and she describes dizziness on standing up. What is the single most likely electrolyte pattern to be found?

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A 60 year old woman has tiredness. She has noticed that her skin looks permenantly tanned and

she describes dizziness on standing up. What is the single most likely electrolyte pattern to be

found?


  1. Na+=120mmol/L, K+=5.9mmol/L
  2. Na+=125mmol/L, K+=2.9mmol/L
  3. Na+=140mmol/L, K+=4.5mmol/L
  4. Na+=150mmol/L, K+=3.5mmol/L
  5. Na+=150mmol/L, K+=5.9mmol/L

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The key is A. Na+=120mmol/L, K+=5.9mmol/L. [Tanned skin (hyperpigmentation) and postural

hypotension in a tired women points towards Addison’s disease where hyponatremia and hyperkalemia

is seen].

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