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Determining Glucose Metabolism Kinetics Using 18F-FDG Micro-PET/CT
Published on: May 2, 2017
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18F-FDG PET/CT in Urachal Abscess.
Anthime Flaus1, Maria-Giulia Longo1, Marine Dematons2
1From the Departments of Nuclear Medicine, and.
Clinical Nuclear Medicine
|March 5, 2019
Summary
A urachal abscess in an 11-year-old girl presented as an intense, FDG-avid pelvic mass. Intense uptake on F-FDG PET/CT can suggest infection over malignancy in urachal pathologies.
Area of Science:
- Pediatric imaging
- Nuclear medicine
- Urologic oncology
Background:
- A urachal remnant is a congenital abnormality that can rarely undergo malignant transformation or develop infections.
- Pelvic masses in children can present with vague symptoms, complicating diagnosis.
Observation:
- An 11-year-old girl presented with constitutional symptoms including fever, fatigue, and weight loss.
- Imaging studies including ultrasound, CT, and F-FDG PET/CT revealed an equivocal, intensely FDG-avid pelvic mass near the bladder.
Findings:
- Pathological examination confirmed the pelvic mass was a urachal abscess, not a urachal carcinoma.
- The intense fluorodeoxyglucose (FDG) uptake on PET/CT was a key differentiator.
Implications:
- This case highlights that intense FDG avidity on PET/CT in a urachal mass may indicate an infectious process like an abscess.
- Distinguishing between urachal abscess and urachal carcinoma based on imaging features, particularly FDG uptake, is crucial for appropriate management.
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