A cancer patient with SIADH exhibits low serum osmolality and inappropriately concentrated urine. Which tumor type is classically associated with SIADH?

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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.

Multiple Choice

A cancer patient with SIADH exhibits low serum osmolality and inappropriately concentrated urine. Which tumor type is classically associated with SIADH?

Sure. SIADH happens when a tumor secretes antidiuretic hormone (ADH) outside normal control, causing water retention, lowering serum osmolality, and producing inappropriately concentrated urine. The cancer most classically linked to ectopic ADH production is small cell lung carcinoma, because of its neuroendocrine origin and tendency to secrete hormones like ADH. This makes it the best answer for a tumor type associated with SIADH. Other options are less typical: adenocarcinoma and squamous cell carcinoma have different paraneoplastic profiles (squamous often due to PTHrP causing hypercalcemia), and mesothelioma is not typically linked to SIADH.

A cancer patient with SIADH exhibits low serum osmolality and inappropriately concentrated urine. Which tumor type is classically associated with SIADH?

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.

A cancer patient with SIADH exhibits low serum osmolality and inappropriately concentrated urine. Which tumor type is classically associated with SIADH?

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