Q:

A 71 year old man with a history of 50 years of smoking presents with cough, hemoptysis, dyspnea and chest pain. He also has anorexia and weight loss. The diagnosis of lung cancer has been stabilized. Which electrolyte abnormality can be seen?

waelhammad
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2022-11-03
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A 71 year old man with a history of 50 years of smoking presents with cough, hemoptysis, dyspnea and chest pain. He also has anorexia and weight loss. The diagnosis of lung cancer has been stabilized. Which electrolyte abnormality can be seen?

  1. Hyperkalemia
  2. Hypocalcemia
  3. Hyponatremia
  4. Hypernatremia
  5. Hypomagnesemia
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waelhammad
2022-11-03
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The key is C. Hyponatremia. [Likely diagnosis is small cell lung cancer causing SIADH and resulting hyponatremia].

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