Potential Clinical Utility of FDG-PET in Non-malignant Pulmonary Disorders: A Pilot Study

Area of Science:

• Pulmonary Medicine
• Nuclear Imaging
• Diagnostic Radiology

Background:

• Fluorodeoxyglucose-positron emission tomography (FDG-PET) is increasingly recognized for its role in evaluating benign pulmonary conditions.
• This study aimed to assess the diagnostic and monitoring utility of FDG-PET in various non-malignant lung diseases.

Purpose of the Study:

• To investigate the efficacy of FDG-PET in diagnosing benign lung diseases.
• To evaluate the role of FDG-PET in monitoring treatment response in these conditions.

Main Methods:

• A prospective observational study included 50 patients with benign lung diseases.
• Patients underwent computed tomography (CT) and FDG-PET at baseline and post-treatment.
• FDG-PET findings were correlated with clinical, histopathological, physiological, and radiological data.

Main Results:

• All patients exhibited increased FDG uptake in the lungs consistent with CT findings.
• In sarcoidosis, additional myocardial and thyroid uptake altered treatment in two patients.
• Post-treatment scans showed decreased uptake, correlating with clinical and spirometry improvements.
• FDG-PET identified increased uptake in pulmonary tuberculosis and idiopathic interstitial pneumonias, sometimes correlating with disease extent (e.g., honeycombing).

Conclusions:

• FDG-PET serves as a valuable non-invasive tool for diagnosing and monitoring benign lung conditions.
• The scan can assess systemic disease burden, influencing therapeutic decisions.