The nurse cares for a client with advanced non-small cell lung cancer who is dyspneic and complains of a dry cough. Which oncologic complication should the nurse expect to observe?

Oncologic complications in advanced lung cancer often result from tumor invasion, obstruction, or metastatic spread affecting thoracic structures. Respiratory symptoms such as dyspnea and cough commonly reflect fluid accumulation or airway compromise within the pleural space. In non-small cell lung cancer, pleural involvement is a frequent late-stage manifestation due to tumor irritation and lymphatic obstruction. Recognizing these complications is essential for symptom management and palliative care. Rationale: A. Pleural effusion is a common complication of advanced non-small cell lung cancer caused by malignant infiltration or lymphatic obstruction of pleural drainage. Fluid accumulation in the pleural space compresses lung tissue, leading to dyspnea and a persistent dry cough. Patients may also experience decreased breath sounds and chest discomfort. This finding aligns closely with the described respiratory symptoms in advanced disease. B. Hypernatremia is not a typical direct complication of lung cancer itself but may occur secondary to dehydration, renal dysfunction, or syndrome of inappropriate antidiuretic hormone (SIADH) treatment imbalances. SIADH in lung cancer more commonly leads to hyponatremia rather than elevated sodium levels. C. Hypocalcemia is more commonly associated with conditions such as hypoparathyroidism, vitamin D deficiency, or tumor lysis syndrome in hematologic malignancies. While lung cancer can metastasize to bone, it typically causes hypercalcemia due to bone destruction rather than low calcium levels. Thus, hypocalcemia does not explain the respiratory findings in this patient. D. Inferior vena cava syndrome is not a typical complication of lung cancer; instead, superior vena cava syndrome is more commonly associated with thoracic tumors. Inferior vena cava obstruction is usually related to abdominal or pelvic tumors such as renal or hepatic malignancies.