Which lung cancer is most commonly associated with hypercalcemia?

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Study for the NBME Form 13 Test with our comprehensive quiz collection, featuring flashcards and multiple-choice questions to ensure your readiness. Enhance your knowledge with detailed explanations for each question.

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Which lung cancer is most commonly associated with hypercalcemia?

Hypercalcemia from cancer is often due to a humoral factor produced by the tumor. In lung cancers, squamous cell carcinoma is the classic culprit because the tumor cells frequently secrete PTH-related peptide (PTHrP). PTHrP acts like parathyroid hormone, stimulating osteoclast-mediated bone resorption and increasing renal calcium reabsorption, which raises serum calcium levels. This paraneoplastic mechanism is far more characteristic of squamous cell carcinoma than of the other main lung cancer types. Small cell carcinoma tends to cause SIADH or ectopic ACTH production, while adenocarcinoma and large cell carcinoma are less commonly associated with hypercalcemia.

Which lung cancer is most commonly associated with hypercalcemia?

Study for the NBME Form 13 Test with our comprehensive quiz collection, featuring flashcards and multiple-choice questions to ensure your readiness. Enhance your knowledge with detailed explanations for each question.

Which lung cancer is most commonly associated with hypercalcemia?

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