Abstract
Clinical data and lymphoma biopsies were analyzed in 651 patients with non-Hodgkin lymphoma in order to describe the prognostic influence of different grades of follicular architecture compared to diffuse architecture. The follicularity was graded qualitatively according to the distinctness of the pattern (intra-follicular, infiltrative follicular and traceably follicular patterns). The partially follicular pattern, with co-existence of follicular and diffuse areas in the same biopsy, was graded quantitatively according to the proportion of these areas. The median survival of patients with diffuse pattern was 1.2 years, while that of patients with follicular patterns ranged from 2.5 to 7.3 yr. The prognosis for those with partially follicular pattern was not affected, whether or not more or less than 50% of the lymphoma was diffuse. For cytologically identical lymphomas, only the intra- and infiltrative follicular patterns influenced the prognosis favourably. This conclusion was further substantiated by means of multivariate analysis.
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