Abstract
Orbital metastases from malignant tumors are uncommon. In 25% of cases, they are the
first sign of an undiagnosed cancer, and they account for approximately 7 to 12% of
lung cancer cases. A lack of awareness about this condition can lead to misdiagnosis,
distinguishing malignant from benign lesions. We present the case of a 65-year-old
patient with orbital metastasis from lung cancer. 18F-fluorodeoxyglucose (18F-FDG)
positron emission tomography/computed tomography (PET/CT) was crucial in diagnosing
this, revealing hypermetabolism in the left lung mass as well as intense uptake in
the right retro-orbital region, which was confirmed as orbital metastasis through
cerebro-orbital magnetic resonance imaging. For 2 months, our patient had right eye
pain and decreased visual acuity and no attention was paid to these symptoms. Through
this clinical case, the authors highlight the utility of 18F-FDG PET/CT in the diagnosis
of primary malignancy in lung cancer patients, who presented with orbital metastasis
as the first sign.
Keywords
18F-FDG - lung adenocarcinoma - orbital metastasis - PET/CT
