Patients with B-cell lymphoma are immunocompromised because of the disease and its treatments. This presents the question of their outcomes upon infection with SARS-CoV-2. Researchers assessed the characteristics of patients with lymphoma hospitalized for COVID-19 and analyzed determinants of mortality in a retrospective database study. The investigators looked at data from adult patients with lymphoma who were hospitalized for COVID-19 in March and April 2020 in three French regions.
Older age and relapsed/refractory (r/r) disease in B-cell lymphoma patients were both found to be independent risk factors of increased death rate from COVID-19, according to the online report in EClinicalMedicine, published by The Lancet.
These results encourage “the application of standard Covid-19 treatment, including intubation, for lymphoma patients with Covid-19 lymphoma diagnosis, under first- or second-line chemotherapy, or in remission,” according to Sylvain Lamure, MD, of Montellier (France) University, and colleagues.
The study examined a series of 89 consecutive patients from three French regions who had lymphoma and were hospitalized for COVID-19 in March and April 2020. The population was homogeneous; most patients were diagnosed with B-cell non-Hodgkin lymphoma (NHL) and had been treated for their lymphoma within 1 year.
Promising results for many
There were a significant associations between 30-day mortality and increasing age (over age 70 years) and r/r lymphoma. However, in the absence of those factors, mortality of the lymphoma patients with COVID-19 was comparable with that of the reference French COVID-19 population. In addition, there was no significant impact of active lymphoma treatment that had been given within 1 year, except for those patients who received bendamustine, which was associated with greater mortality, according to the researchers.
With a median follow-up of 33 days from admission, the Kaplan-Meier estimate of 30-day overall survival was 71% (95% confidence interval, 62%-81%). According to histological type of the lymphoma, 30-day overall survival rates were 80% (95% CI, 45%-100%) for Hodgkin lymphoma, 71% (95% CI, 61%-82%) for B-cell non-Hodgkin Lymphoma, and 71% (95% CI, 38%-100%) for T-cell non-Hodgkin Lymphoma.
The main factors associated with mortality were age 70 years and older (hazard ratio, 3.78; 95% CI, 1.73-8.25; P = .0009), hypertension (HR, 2.20; 95% CI, 1.06-4.59; P = .03), previous cancer (HR, 2.11; 95% CI, 0.90-4.92; P = .08), use of bendamustine within 12 months before admission to hospital (HR, 3.05; 95% CI, 1.31-7.11; P = .01), and r/r lymphoma (HR, 2.62; 95% CI, 1.20-5.72; P = .02).
Overall, the Kaplan-Meier estimates of 30-day overall survival were 61% for patients with r/r lymphoma, 52% in patients age 70 years with non–r/r lymphoma, and 88% for patients younger than 70 years with non–r/r, which was comparable with general population survival data among French populations, according to the researchers.
“Longer term clinical follow-up and biological monitoring of immune responses is warranted to explore the impact of lymphoma and its treatment on the immunity and prolonged outcome of Covid-19 patients,” they concluded.
The study was unsponsored. Several of the authors reported financial relationships with a number of biotechnology and pharmaceutical companies.
SOURCE: Lamure S et al. EClinicalMedicine. 2020 Oct 12. doi: 10.1016/j.eclinm.2020.100549.