A 64-year-old man with a 50-year smoking history presents with dyspnea and chest pain. Vital signs show BP 138/82, HR 102, RR 22, SpO2 88% on room air. Chest CT reveals a 6 cm central hilar mass with mediastinal involvement. Brain MRI shows multiple metastases. Labs demonstrate hyponatremia (Na 118 mEq/L) consistent with SIADH. He denies hemoptysis. Which lung cancer subtype is most likely?

  1. A)Squamous cell carcinoma
  2. B)Adenocarcinoma
  3. C)Small cell lung cancerGABARITO
  4. D)Mesothelioma
  5. E)Large cell carcinoma

Explicação

Small cell lung cancer is a neuroendocrine malignancy strongly associated with smoking, presenting with central masses, early mediastinal involvement, rapid brain metastasis, and SIADH due to secretion of ADH by tumor cells. Ver explicação completa e trilha adaptativa →

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