Large proportion of Epstein-Barr virus-associated small noncleaved cell lymphomas among children with non-Hodgkin's lymphoma at a single institution in Moscow, Russia.

To evaluate clinical and biologic features of children with non-Hodgkin's lymphoma (NHL) treated in Moscow, Russia, we studied 53 cases treated in the Republican Children's Hospital from 1990 to 1994. Histologic examination disclosed a predominance of the small noncleaved cell subtype (32 cases, 60%); a smaller percentage of the lymphoblastic and large-cell subtypes (14 cases, 26% and 7 cases, 13%, respectively) were identified. The frequencies of primary sites of involvement in descending order included 60% in abdomen, 19% in mediastinum, 15% in head/neck, and 4% in peripheral nodes.

[Comparative effectiveness of treatment of non-Hodgkin's lymphoma in children using protocols BFM NHL-90 and non-programmed courses based on the ACOP regimen].

170 NHL children aged 1-14 [mean age 6] have been treated for the last 5 years. The diagnostic examination included the disease history, physical examination, bone marrow cytology, tumor histology (all patients), immunophenotyping (17 cases), x-ray and sonography of the chest and abdomen. According to the International NHL staging system, 35% of the patients had NHL stage II, 65% stage III or IV.