[Lymphoma of the prostate: case reports and subject review].

Malignant lymphomas involving the prostate are rare whether as primary lymphoma or as secondary to generalized disease. Middle age, histotype prevalently non Hodgkin, intermediate and high grade of malignancy, symptoms of bladder outflow obstruction, diagnosis generally made after histological examination, severe prognosis are the most important features that result from literature review. The evaluation of therapeutic treatments is difficult as most reports do not include a sufficient number of cases.

[Malignant histiocytosis. Clinical contribution and review of the subject].

Malignant histiocytosis (MH) is a rare and severe disease caused by malignant histiocyte degeneration in the sinuses of the reticuloendothelial system. The clinical picture presents fever, wasting, enlargement of the liver and spleen and lymphoadenopathy. Diagnosis is based on histological criteria and it may prove very difficult to differentiate between MH and malignant lymphomas, acute monocytic leukemia and the histiocytoses considered benign.