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1.
Acta Oncol ; 58(11): 1564-1569, 2019 Nov.
Article in English | MEDLINE | ID: mdl-31368395

ABSTRACT

Introduction: Patients with follicular lymphoma (FL) have classically had a higher risk of solid cancers than the general population, but there is little data available in patients diagnosed and treated with modern day regimens.Material and methods: We conducted a retrospective multicenter study assessing the cumulative incidence of solid cancers other than nonmelanoma skin cancer in patients with FL between 1997 and 2016 and determined the standardized incidence ratio (SIR) to compare the incidence of solid cancers with that of the general populationResults: Among 1002 FL patients with 7 years of median follow-up, we found 74 solid cancers (most common breast [n = 19], lung and colon [n = 9 each]). The cumulative incidence was 3.8% at 5 years (95%CI 2.6-5.2) from the time of diagnosis and 4.4% at 5 years (95%CI 3.1-5.9%) from the time of front-line treatment. Although a comparison of all front-line strategies did not reveal differences in the risk of solid cancers, patients treated with anthracycline-based regimens appeared to have a lower incidence than those treated with bendamustine-based strategies (2.8% vs. 6.9%). However, patients receiving the former regimen were younger than the latter. On multivariable analysis, older age was correlated with the incidence of solid cancer and bendamustine-based treatment was of borderline significance. SIR for any solid cancer was 1.22 (95%CI 0.91-1.64), indicating no increased risk of solid cancer in patients with FL over that of the general population. However, on subgroup analyses, female patients treated with bendamustine-based strategies appeared to have a greater risk (SIR 3.85 [95%CI 1.45-10.27])Discussion: The incidence of solid cancer in this cohort of patients with FL was low and not greater than in the general population. However, the risk may be greater in female patients treated with bendamustine.


Subject(s)
Lymphoma, Follicular/epidemiology , Neoplasms, Second Primary/epidemiology , Age Factors , Aged , Female , Humans , Incidence , Lymphoma, Follicular/pathology , Lymphoma, Follicular/therapy , Male , Middle Aged , Neoplasms, Second Primary/pathology , Neoplasms, Second Primary/therapy , Retrospective Studies , Sex Factors
2.
Br J Haematol ; 187(3): 364-371, 2019 11.
Article in English | MEDLINE | ID: mdl-31267514

ABSTRACT

Follicular lymphoma (FL) is the most common indolent lymphoma. Currently there are many comparable treatment options available for FL. When selecting the most optimal therapy it is important to consider possible late effects of the treatment as well as survival. Secondary haematological malignancy (SHM) is a severe late effect of treatments, but the incidence of SHMs is still largely unknown. The goal of the present study was to determine the incidence of SHMs and how therapeutic decisions interfere with this risk. The study included 1028 FL patients with a median follow-up time of 5·6 years. The 5-year risk of SHM was 1·1% and the risk was associated with multiple lines of treatment (P = 0·016). The 5-year risk of SHM was 0·5% after the first-line treatment and 1·6% after the second-line. The standardized incidence ratio (SIR) was 6·2 (95% confidence interval 3·4-10·5) for SHM overall. This retrospective study found that the risk of SHM was low after first-line treatment in FL patients from the rituximab era. However, the risk of SHM increases with multiple lines of treatment. Therapeutic approaches should aim to achieve as long a remission as possible with first-line treatment, thereby postponing the added risk of SHM.


Subject(s)
Hematologic Neoplasms , Lymphoma, Follicular , Neoplasms, Second Primary , Registries , Rituximab/administration & dosage , Adolescent , Adult , Aged , Aged, 80 and over , Disease-Free Survival , Female , Follow-Up Studies , Hematologic Neoplasms/drug therapy , Hematologic Neoplasms/mortality , Humans , Lymphoma, Follicular/drug therapy , Lymphoma, Follicular/mortality , Male , Middle Aged , Neoplasms, Second Primary/drug therapy , Neoplasms, Second Primary/mortality , Retrospective Studies , Risk Factors , Survival Rate
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