Transformed Waldenström Macroglobulineamia

Study Overview
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Brief Summary
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Histological transformation to diffuse large B-cell lymphoma is a rare complication which may occur in Waldenstrom macroglobulinemia. In this multicenter study, we retrospectively analyzed the clinico-biological features, therapy, outcomes and prognostic factors in 77 Waldenstrom macroglobulinemia patients with biopsy-proven transformation to diffuse large B-cell lymphoma.

Detailed Description
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Histological transformation to diffuse large B-cell lymphoma is a rare complication which may occur in Waldenstrom macroglobulinemia. In this multicenter study, we retrospectively analyzed the clinico-biological features, therapy, outcomes and prognostic factors in 77 Waldenstrom macroglobulinemia (WM) patients with biopsy-proven transformation to diffuse large B-cell lymphoma (DLBCL). We retrospectively searched the databases of French and Belgian centers for patients older than 18 years diagnosed with WM and a concurrent or sequential diagnosis of DLBCL between 1995 and 2016. Nineteen centers belonging to the French Innovative Leukemia Organization (FILO) group participated in this study. Patients with a diagnosis of indolent lymphoma other than WM were excluded. The diagnosis of WM was based on criteria established in the Second International Workshop on WM. Clinical, biological data and prognostic scores were recorded. Quantitative variables were expressed as median and range and qualitative variables as number and percentages. Multivariate analyses using cox proportional hazard model were conducted to investigate the factors independently related to progression-free survival and overall survival.

Official Title
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Transformed Waldenström Macroglobulinaemia: Clinical Presentation and Outcome. A Multi-institutional Retrospective Study of 77 Cases From the French Innovative Leukemia Organization (FILO)

Conditions
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Transformed Waldenström Macroglobulineamia

Intervention / Treatment
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* Other: Non Applicable


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients older than 18 years diagnosed with Waldenstrom macroglobulineamia and a concurrent or sequential diagnosis of diffuse large B-cell lymphoma between 1995 and 2016 Exclusion Criteria: Patients with a diagnosis of indolent lymphoma other than Waldenstrom macroglobulineamia

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Other: Non Applicable|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Description of clinical and biological features, therapeutic approaches, and clinical outcomes of patients with transformed Waldenstrom macroglobulineamia |  | 21 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Prognostic factor of progression-free survival (the time from diagnosis of histological transformation until progression, death from any cause or last follow-up) |  | 21 years | 
| Prognostic factor of overall survival (the time from diagnosis of histological transformation until death from any cause or last follow-up) |  | 21 years |