False Positivity of Fludeoxyglucose Positron Emission Tomography/Computed Tomography in Patients With Isolated Mediastinal Lymph Node Involvement With Extrathoracic Malignancies

Background: Intrathoracic lymph node metastasis from an extrathoracic malignancy is a rare but important situation. In this study, false-positive positron emission tomography (PET)/computed tomography (CT) findings of mediastinal lymph nodes in nonthoracic tumours were evaluated.