Primary immunodeficiency and recalcitrant chronic sinusitis: a systematic review

Area of Science:

• Immunology
• Otolaryngology
• Genetics

Background:

• A significant portion of chronic rhinosinusitis (CRS) cases resist standard treatments.
• Primary immunodeficiency (PID) is an underrecognized cause of refractory CRS.
• Existing literature suggests a link between PID and chronic sinusitis.

Purpose of the Study:

• To systematically review the literature on primary immunodeficiency in patients with chronic rhinosinusitis.
• To analyze the immune dysfunction, diagnostic workup, and treatment efficacy in this patient group.

Main Methods:

• A systematic literature search was conducted across major databases (OVID, MEDLINE, EMBASE, Cochrane).
• Inclusion criteria focused on English language papers with original human data on PID and chronic sinusitis.
• 39 studies were included, with data extracted on immune dysfunction, clinical evaluation, and treatment outcomes.

Main Results:

• Most studies (Level 4 evidence) indicated immune dysfunction in up to 50% of patients with recalcitrant CRS.
• Common variable immunodeficiency (CVID) and X-linked agammaglobulinemia (XLA) were the most frequently identified PIDs.
• Key diagnostic measures included serum immunoglobulin levels and functional antibody responses; treatments involved immunoglobulin replacement, antibiotics, and surgery.

Conclusions:

• Recalcitrant CRS patients warrant evaluation for PID, including assessment of immunoglobulin levels and antibody function.
• High-dose immunoglobulin replacement therapy, initiated early, shows the most promise for medical management.
• Surgical intervention may offer benefits if performed early in the disease course.