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[Small-cell lung carcinoma with hyponatremia].
M G van Pampus1, P L Meenhorst
1Slotervaartziekenhuis, afd. Interne Geneeskunde, Amsterdam.
Nederlands Tijdschrift Voor Geneeskunde
|March 2, 1991
Summary
Small-cell lung cancer can cause severe hyponatremia (low sodium) due to the inappropriate ADH syndrome. Prompt treatment of both conditions is crucial for managing symptoms and prognosis.
Area of Science:
- Oncology
- Endocrinology
- Pulmonology
Background:
- Small-cell bronchogenic carcinoma is a significant cause of cancer-related mortality.
- The inappropriate ADH syndrome is a known paraneoplastic complication of various cancers.
- This syndrome can lead to severe electrolyte imbalances, notably hyponatremia.
Observation:
- Two female patients presented with unusual symptoms including epigastric pain, nausea, dizziness, and unconsciousness.
- These symptoms were attributed to severe hyponatremia, likely caused by the inappropriate ADH syndrome.
- Both patients had an underlying diagnosis of small-cell bronchogenic carcinoma.
Findings:
- Correction of hyponatremia and treatment of the carcinoma led to normalized serum sodium levels and symptom resolution.
- Despite treatment, both patients had a poor prognosis, with survival times of 14 and 9 months post-diagnosis.
- Approximately 14% of small-cell bronchogenic carcinomas in the Netherlands are associated with the inappropriate ADH syndrome.
Implications:
- The inappropriate ADH syndrome associated with small-cell lung cancer indicates a graver prognosis.
- Early recognition and management of hyponatremia are critical in patients with small-cell bronchogenic carcinoma.
- This case highlights the importance of considering paraneoplastic syndromes in cancer diagnosis and management.