The lymphoblastic lymphoma: a clinical and morphological entity, two new cases.

There are reported two new cases of lymphoblastic lymphoma in an 8 and a 12 year-old child respectively. The diagnosis is based on cytological features, similar or identical to those of acute lymphoblastic leukemia, the presence of a mediastinal growth and a rapid evolution, and with an early involvement of the bone marrow. The cytohistological pattern was dominated in one case by the proliferation of immature lymphocytes with convoluted nuclei, and in the second one by immature lymphocytes with round nuclei. The T cell origin of these lymphomas and the practical value of their recognition for an early treatment are discussed.