title: Unusual Horner's Syndrome in Recurrent Breast Cancer: Evaluation Using18F-FDG PET/CT.
abstract: 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) is a widely used imaging modality in the initial diagnosis of cancer, treatment response evaluation and detection of recurrence. Herein, we present the case of a 39-year-old female who presented right ptosis on the follow-up of breast cancer after surgery. Clinicians suspected Horner's syndrome, and the patient underwent FDG PET/CT for the evaluation of recurrence that could cause Horner's syndrome. FDG PET/CT demonstrated a focal hypermetabolic lesion in the right cervicothoracic junction area, corresponding to the preganglionic cervical sympathetic trunk. A subsequent needle biopsy was done, and the lesion was confirmed as metastatic ductal carcinoma. In this case, we could detect the exact location of the recurring lesion that caused Horner's syndrome using FDG PET/CT.
authors.affiliation: Department of Nuclear Medicine, National Cancer Center, Goyang-si, Gyeonggi-do 463-707 Republic of Korea.|Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul, South Korea.
authors.forename: Sohyun
authors.initials: S
authors.lastname: Park
authors.affiliation: Department of Nuclear Medicine, National Cancer Center, Goyang-si, Gyeonggi-do 463-707 Republic of Korea.
authors.forename: Tae Sung
authors.initials: TS
authors.lastname: Kim
authors.affiliation: Department of Nuclear Medicine, National Cancer Center, Goyang-si, Gyeonggi-do 463-707 Republic of Korea.
authors.forename: Seok-Ki
authors.identifier: 0000-0002-7512-5567
authors.initials: SK
authors.lastname: Kim
keywords: Breast cancer; FDG PET/CT; Horner’s syndrome; Recurrence