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Updated: Aug 15, 2026

Analysis of 18FDG PET/CT Imaging as a Tool for Studying Mycobacterium tuberculosis Infection and Treatment in Non-human Primates
Published on: September 5, 2017
FDG-PET imaging in Pneumocystis carinii pneumonia
Zarni Win1, Jonathan Todd, Adil Al-Nahhas
1Department of Nuclear Medicine, Hammersmith Hospital, London, UK. zarni_win@hotmail.com
Abstract:
The authors present a case of a 26-year-old man, under investigation for Cushing syndrome, who presented acutely with a dry cough and fever. The blood tests were unremarkable apart from a moderate to severe leukopenia. Imaging tests were suggestive of an atypical pneumonia, which was proven to be Pneumocystis carinii pneumonia (PCP) on cytology examination of a bronchoalveolar lavage (BAL). The acute lung changes were demonstrated on a whole-body F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) study. After treatment, a follow-up study showed complete resolution of these changes. The authors suggest that FDG PET may have a role to play in the diagnosis and, in particular, the monitoring of PCP in immunocompromised patients.
Insights
A case study highlights Pneumocystis pneumonia (PCP) in an immunocompromised patient. F-18 fluorodeoxyglucose positron emission tomography (FDG PET) effectively monitored treatment response, showing complete resolution of lung changes.
Area of Science:
- Medical Imaging
- Infectious Diseases
- Pulmonology
Background:
- Presents a case of a 26-year-old male investigated for Cushing syndrome.
- Patient exhibited acute symptoms of dry cough and fever with leukopenia.
Observation:
- Imaging suggested atypical pneumonia, confirmed as Pneumocystis carinii pneumonia (PCP) via bronchoalveolar lavage (BAL) cytology.
- Acute lung changes were visualized using whole-body F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET).
Findings:
- FDG PET imaging successfully demonstrated acute lung changes associated with PCP.
- Follow-up FDG PET studies after treatment showed complete resolution of these pulmonary abnormalities.
Implications:
- Suggests a potential diagnostic and monitoring role for FDG PET in PCP.
- Highlights FDG PET's utility in assessing treatment efficacy for PCP in immunocompromised individuals.
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