Nucl Med Mol Imaging.  2011 Sep;45(3):223-228.

Bilateral Tubo-Ovarian Abscess Mimics Ovarian Cancer on MRI and 18F-FDG PET/CT

Affiliations
  • 1Department of Nuclear Medicine, Royal Victoria Hospital, McGill University Health Centre, 687 Pine Ave West, Floor M2, Montreal, Quebec H3A 1A1, Canada.
  • 2Department of Nuclear Medicine, Brandon Regional Health Centre, 150 McTavish Ave E, Brandon, MB R7A 2B3, Canada. makisw79@yahoo.com

Abstract

A 20-year-old woman, who presented with a several-week history of abdominal pain, was referred for magnetic resonance imaging (MRI) and 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) after an ultrasound showed complex cystic masses arising from both ovaries. The MRI and 18F-FDG PET/CT imaging characteristics of the ovarian masses were strongly suspicious for malignancy, and the masses were surgically removed. Histopathological evaluation revealed a bilateral tubo-ovarian abscess, with no evidence of malignancy. This case highlights a potentially serious pitfall in the evaluation of suspicious pelvic masses by 18F-FDG PET/CT, whereby a complex bilateral tubo-ovarian abscess may mimic the PET/CT imaging characteristics of an ovarian or pelvic malignancy.

Keyword

Tubo-ovarian abscess; Ovarian cancer; Fluorodeoxyglucose; FDG; PET

MeSH Terms

Abdominal Pain
Abscess
Female
Fluorodeoxyglucose F18
Humans
Hydrazines
Magnetic Resonance Imaging
Ovarian Neoplasms
Ovary
Positron-Emission Tomography
Young Adult
Fluorodeoxyglucose F18
Hydrazines
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