A case of non-small cell lung cancer with false-positive staging by positron emission tomography.
A 70-year-old woman with right lung cancer was admitted to our hospital. Chest computed tomography (CT) revealed an approximate 2.5 cm sized mass in the right middle lobe, and enlarged hilar and mediastinal lymph nodes. The 2-fluoro-2-deoxy-D-glucose positron emission tomography (FDG-PET) showed high uptake in the right hilar and mediastinal nodes. Therefore we diagnosed N2 (mediastinal nodal involvement) disease. Microscopically, however, all dissected lymph nodes revealed anthracosilicosis and negative for malignancy. Although false-positive evaluation of mediastinal involvement by PET can occur in the setting of metabolically active inflammatory disease, this case did not have these active diseases. The FDG-PET result of this case was unusual.
Department of Surgery, Miyazaki Prefectural Nichinan Hospital, Miyazaki, Japan.
Masaki
M
Tomita
Hideki
H
Ichinari
Yuji
Y
Tomita
Kazuhiko
K
Mine
Hirotoshi
H
Iiboshi
Atsushi
A
Kisanuki
Koichiro
K
Shibata
D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005189:False Positive Reactions; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D019275:Radiopharmaceuticals; D014055:Tomography, Emission-Computed
D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18