[Double clone in cells of pleural effusion caused by metastasis of oat cell carcinoma of the lung]

The Authors report a chromosome study carried out on pleural effusion cells from metastases of oat cell carcinoma. They observed a double cell clone: the former, with 44 chromosomes, with various alterations of the karyotype and a big acrocentric "marker", the latter, with 45 chromosomes with various alterations of the karyotype and a big submetacentric "marker". From these observations the Authors draw some interpretative considerations.