[Gastric and pleural localization of Waldenström's disease].

The authors report a case of Waldenstrom's disease, the first sign of which, remaining for a long time the only sign, was a pseudo-carcinomatous infiltration of the stomach. Later, the patient developed a pleural localisation. These two lesions, gastric and pleural, are known but rare. The authors recall the main signs. They emphasize the long duration of the disease when treated by chlorambucil. A pathological IgM was found, not only in the serum of this patient, but also in the jejunal fluid aspirated during small intestinal biopsy.