[Diffuse bone metastases revealing pleural mesothelioma. Case report].

A 76 year old man, presenting with symptoms of general malaise alone, had a marrow biopsy which showed and undifferentiated carcinoma. A subsequent autopsy revealed a multi-nodular pleural mesothelioma, which was not seen radiologically, presumably because of the small size of the nodule. There were bilateral adrenal metastases and diffuse bony metastases involving the marrow. An occupational contact with asbestos was retrospectively confirmed. It is rare that a pleural mesothelioma does not exhibit thoracic signs and very uncommon that bony metastases should give the diagnosis in such a tumour.