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Lymphoma occurring in patients aged 90 or older is not uncommon, and its incidence is expected to increase over time. Management of these patients is difficult given their underlying fragility and the lack of information regarding this population.We retrospectively analyzed 234 patients diagnosed with lymphoma at the age of 90 years or older (90+) between 1990 and 2012 to describe their characteristics, management, outcomes and prognostic factors.The median age was 92 years; 88% were B-cell lymphomas consisting mainly in diffuse large B-cell lymphoma. The median overall survival (OS) was 7.2 months (range, 0–92 months) for the 227 patients with non-Hodgkin Lymphoma (NHL), with a significant difference between aggressive and indolent NHL (5.2 months versus 19.4 months, respectively). We further analyzed 166 NHL patients for whom detailed characteristics were available. Among these patients, 63.5% received a treatment, either local (7.5%) or systemic (56%). Lymphoma was reported as the main cause of death (40%). Treatment administration was associated with improved OS in patients with aggressive (P < 0.001) but not indolent NHL (P = 0.96). In patients with aggressive NHL, hypoalbuminemia appeared as a strong and independent negative prognostic factor.The median OS is short in 90+ patients diagnosed with lymphoma but some patients experience prolonged survival. Lymphoma represents the main cause of death in these patients. Treatment may improve survival of selected patients with aggressive but not indolent NHL. Management of these patients may be guided by prognostic factors identified in this study, notably serum albumin.