Primary mediastinal/thymic diffuse large B-cell lymphoma: a population-based study on incidence and survival

Area of Science:

• Oncology
• Epidemiology
• Hematology

Background:

• Primary mediastinal large B-cell lymphoma (PMBCL) is a rare lymphoma subtype.
• Current incidence data and population-based studies for PMBCL are lacking.
• Understanding PMBCL epidemiology is crucial for public health strategies.

Purpose of the Study:

• To investigate the epidemiology of PMBCL.
• To analyze the impact of treatment advancements on PMBCL patient survival.
• To compare PMBCL survival with nodal diffuse large B-cell lymphoma.

Main Methods:

• A population-based study utilizing the Surveillance, Epidemiology, and End Results (SEER) Program database.
• Analysis of data from 1975 to 2018, including SEER 9 and SEER 18 registries.
• Inclusion of 774 patients from SEER 9 and 1654 patients from SEER 18.

Main Results:

• The age-adjusted incidence rate of PMBCL rose from 0.05/1,000,000 in 1975 to 2.38/1,000,000 in 2018.
• A significant positive linear trend in PMBCL incidence was observed, with an 8.47% annual increase.
• PMBCL patient survival was significantly better than that of nodal diffuse large B-cell lymphoma.
• PMBCL incidence has increased annually, and patient survival has improved over time.

Conclusions:

• PMBCL incidence is rising, necessitating continued research and surveillance.
• Therapeutic advances have led to improved survival rates for PMBCL patients.
• PMBCL outcomes are more favorable compared to nodal diffuse large B-cell lymphoma.