Prognostic factors in non-Hodgkin's lymphoma: the importance of symptomatic stage as an adjunct to the Kiel histopathological classification.

A prospective study of prognostic factors for patients with non-Hodgkin's lymphoma was carried out based on the Kiel histopathological classification. Other presentation features assessed for prognostic value included clinical features, haematological and biochemical findings, and immunochemical findings. The most powerful factors that emerged were the presence or absence of systemic symptoms and the histopathological grade of malignancy of the lymphoma (whether low or high grade). These 2 factors were largely independent. Clinical Stage I disease also carried a good prognosis, but beyond this, staging gave little further prognostic information. Nine of the group of 15 patients with Stage I high grade lymphoma have achieved prolonged disease-free survival after local therapy only. After allowing for histopathology and symptom assessment in patients with Stage II-IV disease, other factors, with the exception of C-reactive protein levels, were of minor importance.