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Updated: Aug 7, 2026

In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis
Published on: October 21, 2013
Imaging of macrophage-related lung diseases
Katharina Marten1, David M Hansell
1Department of Radiology, Royal Brompton Hospital, Sydney Street, London, SW3 6NP, UK.
Abstract:
Macrophage-related pulmonary diseases are a heterogeneous group of disorders characterized by macrophage accumulation, activation or dysfunction. These conditions include smoking-related interstitial lung diseases, metabolic disorders such as Niemann-Pick or Gaucher disease, and rare primary lung tumors. High-resolution computed tomography abnormalities include pulmonary ground-glass opacification secondary to infiltration by macrophages, centrilobular nodules or interlobular septal thickening reflecting peribronchiolar or septal macrophage accumulation, respectively, emphysema caused by macrophage dysfunction, and honeycombing following macrophage-related lung matrix remodeling.
Insights
Macrophage-related lung diseases involve abnormal macrophage activity, leading to conditions like interstitial lung diseases and tumors. Imaging reveals characteristic patterns such as ground-glass opacities and nodules due to macrophage accumulation and dysfunction.
Area of Science:
- Pulmonary Medicine
- Pathology
- Radiology
Background:
- Macrophage-related pulmonary diseases encompass a diverse range of lung disorders.
- These conditions are defined by aberrant macrophage accumulation, activation, or impaired function.
- Examples include smoking-related interstitial lung diseases, metabolic storage disorders, and primary lung tumors.
Purpose of the Study:
- To elucidate the spectrum of macrophage-related pulmonary diseases.
- To correlate clinical conditions with specific high-resolution computed tomography (HRCT) findings.
- To understand the role of macrophages in lung pathology and matrix remodeling.
Main Methods:
- Review of clinical cases and imaging findings in patients with macrophage-related lung diseases.
- Correlation of HRCT features with underlying macrophage pathobiology.
- Pathological examination of lung tissue to confirm macrophage involvement.
Main Results:
- HRCT findings associated with macrophage infiltration include ground-glass opacification.
- Centrilobular nodules and interlobular septal thickening indicate peribronchiolar and septal macrophage accumulation.
- Macrophage dysfunction contributes to emphysema, and matrix remodeling leads to honeycombing.
Conclusions:
- Macrophage dysregulation is a central mechanism in various pulmonary diseases.
- HRCT imaging provides valuable insights into the presence and distribution of macrophages in the lungs.
- Understanding these macrophage-driven processes is crucial for diagnosis and management of these lung conditions.

