Lymphoid malignancy in common variable immunodeficiency in a single-center cohort.

Area of Science:

• Immunology
• Oncology
• Hematology

Background:

• Common variable immunodeficiency (CVID) is associated with an increased risk of lymphoid malignancies.
• Understanding the clinical and immunologic spectrum of these malignancies in CVID patients is crucial for improved diagnosis and management.

Purpose of the Study:

• To investigate the incidence, clinical characteristics, treatment, and outcomes of lymphoid malignancies in a cohort of CVID patients.
• To identify diagnostic challenges in differentiating malignancy from benign lymphoproliferative processes in CVID.

Main Methods:

• Retrospective, single-center study of 647 CVID patients over four decades.
• Analysis of immunologic and clinical phenotypes, pathology, treatment, and outcomes of 45 patients who developed lymphoid malignancies.
• Review of pathology for 6 additional CVID patients initially diagnosed with non-Hodgkin lymphoma (NHL).

Main Results:

• 45 CVID patients developed 49 lymphoid malignancies, with a mean age at diagnosis of 48.8 years.
• Mortality was high, with 70% of patients with known follow-up dying due to lymphoid malignancy.
• Diagnostic challenges were noted, with some NHL diagnoses revised to benign lymphoproliferative processes upon pathology review.

Conclusions:

• Lymphoid malignancy is a significant complication of CVID, associated with poor prognosis.
• Immune dysregulation in CVID can present diagnostic challenges, necessitating careful pathological evaluation.
• Further research is needed to improve early detection and treatment strategies for lymphoid malignancies in CVID patients.