Incidence and Patterns of Bone Marrow and Blood Involvement by Lymphoma in Relationship

Pretreatment lymph nodes. bone marrow. center cell (FCC) lymphomas (55%). The and blood were examined in 1 76 cases of pattern of bone marrow involvement was non-Hodgkins lymphoma. By the criteria of most frequently focal paratrabecular in Bthe Lukes and Collins functional-morphocell lymphomas and diffuse in T-cell logical classification. 1 58 (90%) were B-cell lymphomas. Blood involvement was preslymphomas and 17 (10%) were T-celI ent in 50% of cases with bone marrow lymphomas. Bone marrow involvement lymphoma and generally reflected extenwas present in 53% of cases: 51 % of B-cell sive bone marrow disease. There was a types and 65% of T-ceII types. Marrow higher incidence of both bone marrow and involvement was most frequent in small blood involvement in pediatric patients lymphocyte (B) (89%). convoluted lymphothan in adults. cyte (60%). and small cleaved follicular