[A rheumatologic syndrome (paraneoplastic?) in benign tumors].

The authors discuss the possible development of rheumatoid paraneoplastic syndrome in patients with benign tumours. They present three observations they made (cardiac myxoma, subpleural lipoma and pulmonary fibrosclerotic pseudotumour). Paraneoplasias in these cases are interesting from the pathogenetic aspect as regards their development, possibly malignant transformation of benign intrathoracic tumours.