Cryptogenic Organizing Pneumonia: Evolution of Morphological Patterns Assessed by HRCT

Area of Science:

• Radiology
• Pulmonology
• Medical Imaging

Background:

• Cryptogenic organizing pneumonia (COP) is an idiopathic interstitial pneumonia.
• Radiological assessment is crucial for diagnosing and monitoring COP.
• Understanding treatment response patterns is vital for patient management.

Purpose of the Study:

• To evaluate baseline radiological findings in COP patients before steroid therapy.
• To assess the changes in radiological findings after oral corticosteroid (OCS) treatment.
• To analyze treatment response variability and identify potential adverse outcomes.

Main Methods:

• Retrospective evaluation of 22 COP patients diagnosed via bronchoalveolar lavage, biopsy, or clinical/radiological features.
• Analysis of at least two high-resolution computed tomography (HRCT) scans per patient: one pre-treatment and one post-treatment.
• Collection of demographic data, symptoms, diagnostic methods, and treatment plans from hospital records.

Main Results:

• Baseline CT scans revealed prevalent consolidations (81.8%) and ground-glass opacities (68.1%).
• Post-therapy HRCT showed resolution of most findings, with persistent consolidations in 7 patients (some migratory) and residual ground-glass opacities in 2.
• Two patients developed a fibrosing pattern despite therapy; 3 achieved complete remission off OCS.

Conclusions:

• COP generally responds well to oral corticosteroid treatment.
• However, treatment responses can be variable, with some patients showing null or partial responses.
• Radiological monitoring is essential to track disease behavior and identify potential relapses or fibrotic progression.