[Intravascular malignant lymphoma: report of a case].

The authors describe a case of malignant intravascular angiotropic lymphoma presenting an atypical clinical and radiological picture. After postmortem examination, the histologic test performed on various organs showed massive proliferation of mononucleate neoplastic cells inside small and intermediate-sized vessels without involvement of the surrounding parenchyma. The immunohistochemical exams performed permitted the identification of the above-mentioned cells as lymphoid elements belonging to phenotype B. A bilateral papillar renal necrosis was detected. This necrosis, not mentioned by the preceding literature, was, in all probability, caused by alterations of the microcirculation.