Unusual paraneoplastic syndromes of breast carcinoma: A combination of cerebellar degeneration and Lambert-Eaton Myasthenic Syndrome

Introduction: Paraneoplastic neurological disorders are rare complications of breast carcinoma. Lambert-Eaton Myasthenic Syndrome (LEMS) is most commonly associated with small cell lung cancer. However, a combination of LEMS and subacute cerebellar degeneration as paraneoplastic syndromes is extremely rare, and has never been described in association with breast cancer. Case: We report for the first time an unusual association of LEMS and paraneoplastic subacute cerebellar degeneration with breast carcinoma. Conclusion: In patients with atypical LEMS, when there is no evidence of respiratory malignancy, breast cancer should be included in the differential diagnosis.