title: Bilateral Tubo-Ovarian Abscess Mimics Ovarian Cancer on MRI and (18)F-FDG PET/CT.
abstract: A 20-year-old woman, who presented with a several-week history of abdominal pain, was referred for magnetic resonance imaging (MRI) and (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) after an ultrasound showed complex cystic masses arising from both ovaries. The MRI and (18)F-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 (18)F-FDG PET/CT, whereby a complex bilateral tubo-ovarian abscess may mimic the PET/CT imaging characteristics of an ovarian or pelvic malignancy.
authors.affiliation: Department of Nuclear Medicine, Royal Victoria Hospital, McGill University Health Centre, 687 Pine Ave West, Floor M2, Montreal, Quebec H3A 1A1 Canada.
authors.forename: Rajan
authors.initials: R
authors.lastname: Rakheja
authors.affiliation: Department of Nuclear Medicine, Brandon Regional Health Centre, 150 McTavish Ave E, Brandon, MB R7A 2B3 Canada.
authors.forename: William
authors.initials: W
authors.lastname: Makis
authors.affiliation: Department of Nuclear Medicine, Royal Victoria Hospital, McGill University Health Centre, 687 Pine Ave West, Floor M2, Montreal, Quebec H3A 1A1 Canada.
authors.forename: Marc
authors.initials: M
authors.lastname: Hickeson
keywords: FDG; Fluorodeoxyglucose; Ovarian cancer; PET; Tubo-ovarian abscess