Bronchiectasis in hypogammaglobulinaemia--a computed tomography assessment.

Area of Science:

• Pulmonology
• Immunology

Background:

• Hypogammaglobulinaemia is associated with an increased risk of respiratory infections and complications.
• Bronchiectasis, a chronic lung condition, is a known complication in patients with primary immunodeficiencies.

Purpose of the Study:

• To investigate the characteristic patterns of bronchiectasis in patients with hypogammaglobulinaemia.
• To explore the relationship between bronchial wall thickening and bronchiectasis in this patient population.
• To compare the age of onset of bronchiectasis in X-linked agammaglobulinaemia versus common variable hypogammaglobulinaemia.

Main Methods:

• Retrospective review of CT scans from 38 patients diagnosed with hypogammaglobulinaemia.
• Analysis of the location and pattern of bronchiectasis and bronchial wall thickening.
• Comparison of bronchiectasis onset age between X-linked agammaglobulinaemia (XLA) and common variable hypogammaglobulinaemia (CVH) patients.

Main Results:

• Twenty-two of 38 patients had bronchiectasis; seven showed bronchial wall thickening without bronchiectasis.
• The middle lobe was the most frequently affected site, followed by lower lobes and lingula; no isolated upper lobe involvement was observed.
• Patients with XLA developed bronchiectasis at a significantly younger age than those with CVH (P = 0.02).

Conclusions:

• Bronchiectasis in hypogammaglobulinaemia commonly affects the middle and lower lung lobes.
• Bronchial wall thickening may represent an early inflammatory stage preceding bronchiectasis in these patients.
• XLA is associated with an earlier onset of bronchiectasis compared to CVH, irrespective of initial immunoglobulin levels.