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Small cell lung carcinoma associated with paraneoplastic limbic encephalitis
1Department of Internal Medicine, Veterans General Hospital-Kaohsiung, Taiwan.
Summary
Limbic encephalitis can be an early sign of small cell lung cancer. Early diagnosis and treatment of the lung tumor improved the patient's neurological symptoms and cancer remission.
Area of Science:
- Neurology
- Oncology
Background:
- Limbic encephalitis is a rare neurological disorder often associated with paraneoplastic syndromes.
- Paraneoplastic syndromes occur when cancer triggers an immune response that affects the nervous system.
Observation:
- A 67-year-old male presented with seizures, memory loss, and neuropsychiatric issues.
- Diagnostic workup revealed small cell lung carcinoma (SCLC) as the underlying cause.
- Cerebrospinal fluid, EEG, and MRI findings were consistent with paraneoplastic limbic encephalitis.
Findings:
- The patient's neurological symptoms significantly improved following chemotherapy and radiotherapy.
- Partial remission of the SCLC was achieved.
- No intracranial metastasis was detected on follow-up imaging.
Implications:
- Limbic encephalitis can be an initial presenting symptom of SCLC.
- Increased clinical awareness is crucial for timely diagnosis and treatment of SCLC in patients with limbic encephalitis.
- Early intervention improves patient outcomes and prognosis.