[Paraneoplastic neurologic syndrome and small-cell lung cancer in a patient positive for anti-Hu antigen].

We encountered a case of small-cell lung cancer with paraneoplastic neurologic syndrome in a 68-year old man. Progressive dysesthesia had developed in his hands and legs over a period of 4 months. Chest radiography and chest CT scanning on admission showed a mass in the hilum of the left lung. Anti-Hu antibody was found in his serum and the subsequent histopathological diagnosis by TBLB was small cell lung cancer. The patient underwent complete remission, in terms of tumor size, as a result of concurrent chemoradiotherapy (cisplatin, etoposid) and the dysesthesia in his legs was alleviated.