[A case of CSF (colony-stimulating factor)-producing lung cancer and a review of the literature].

A 36-year-old man with large-cell carcinoma of the lung showed marked leukocytosis of up to 109,300/mm3. As high CSF activity was detected in the pleural effusion and the supernatant of cell cultures originating from the effusion, a diagnosis of CSF-producing lung cancer was made. Twenty-one CSF-producing lung cancers have been reported in Japan. They comprised 13 large-cell carcinomas, six squamous cell carcinomas, one adenocarcinoma and one small cell carcinoma.