[Primary pulmonary lymphoma. Current data. Apropos of 9 cases].

The authors report 9 cases of primary pulmonary lymphoma (PPL). With this report, together with the publication of recent and important studies and with the latest advances in immunology, the principal features of this rare entity are emerging from among other lymphoproliferative pathologies of the lung. As a rule, PPL is a histologically well-differentiated tumour with low malignancy and slow course. Treatment is surgical in localized forms. In extensive forms there is no firmly established treatment, but the absence of clinical symptoms permits therapeutic abstention.