SIADH Association with Lung Cancer Types
The Syndrome of Inappropriate ADH secretion (SIADH) is a condition characterized by excessive water retention due to abnormally high levels of antidiuretic hormone (ADH).
Small cell lung cancer (SCLC) is strongly associated with SIADH. This association is a classic example of a paraneoplastic syndrome, where the tumor produces hormones like ADH ectopically (outside the normal endocrine glands).
While other lung cancers like squamous cell carcinoma, large cell carcinoma, and adenocarcinoma can occasionally be associated with SIADH, the incidence is significantly lower compared to SCLC. Therefore, SCLC is the most common cause among the given options.
Key points:
- SIADH leads to water intoxication and hyponatremia.
- Small cell lung cancer is the most frequent cause of paraneoplastic SIADH.
- Other lung cancer types have a weaker association.
The correct option is the one identifying the most common association.
Important Questions from Electrolyte Imbalance
- Which of the following does NOT cause prolongation of QT interval?
- Which of the following does NOT causes polyuria?
- A 36-year old chronic alcoholic, malnourished male is hospitalized with pneumonia. His condition worsens after aggressive treatment with intravenous dextrose and antibiotics. This phenomenon of 'Refeeding Syndrome' is accompanied by which one of the following biochemical alterations?
- Which one of the following drugs causes hypercalcemia?
A 5 year old boy is brought to the Emergency Room following a crushing injury. The ECG reveals peaked T waves, prolonged PR interval and widened QRS complexes. Which of the following treatments should be administered immediately?
