Addison’s disease is characterized by all except –
Addison's disease is primary adrenal insufficiency, right? It's when the adrenal glands don't produce enough cortisol and aldosterone. The main symptoms would be hyperpigmentation due to increased ACTH, hypotension from low aldosterone causing sodium loss, hyponatremia, hyperkalemia, fatigue, weight loss, and maybe hypoglycemia. Also, there's a decreased response to stress because of cortisol deficiency.
Now, the options aren't here, but common incorrect options might include things like hypertension (which is more in Cushing's), hypernatremia (since Addison's causes hyponatremia), or maybe elevated cortisol levels (but in Addison's, cortisol is low). Another possible wrong answer could be absence of hyperpigmentation, but actually, hyperpigmentation is a hallmark.
Wait, the question asks for the exception. So the correct answer would be the one that doesn't fit. Let's think of typical distractors. For example, if one of the options is "Hypertension," that's incorrect because Addison's leads to hypotension. Or if an option is "Elevated plasma cortisol levels," that's definitely wrong.
I need to structure the explanation with the core concept first. The core concept is that Addison's is primary adrenal insufficiency leading to low cortisol and aldosterone, with symptoms like hyperpigmentation, hypotension, etc. The correct answer is the one that contradicts these features. Then, each wrong option should be explained why it's incorrect. The clinical pearl would be to remember the key signs and symptoms, maybe a mnemonic like "Hyper-pigment, Hypo-tension, Hyper-kalemia" or something like that.
Wait, the user's correct answer is missing the letter and text. So in the final answer, I need to make sure to include that. Also, the user wants the explanation to follow specific sections. Let me outline:
Core Concept: Primary adrenal insufficiency, low cortisol/aldosterone, symptoms include hyperpigmentation, hypotension, etc.
Why Correct Answer is Right: The exception is a feature not seen in Addison's. For example, if the correct answer is B: Hypernatremia, then explain that Addison's causes hyponatremia due to aldosterone deficiency leading to sodium loss.
Why Wrong Options are Incorrect: Each option is a known feature. For example, A: Hyperpigmentation is correct because ACTH stimulates melanocytes. C: Hypotension is due to low aldosterone. D: Hypoglycemia from cortisol deficiency.
Clinical Pearl: Remember that Addison's presents with low sodium, high potassium, hyperpigmentation, and hypotension. The exception would be something opposite like hypertension or hypernatremia.
Correct Answer Line: Need to assign the correct letter based on the options. Since the user didn't provide the options, maybe the correct answer is B, but I need to make sure. Let's assume the options are something like A: Hyperpigmentation, B: Hypernatremia, C: Hypotension