A case of pulmonary typical carcinoid with an extensive oncocytic component showing intense uptake of FDG

18F-FDG PET/CT Diagnosis of Bronchopulmonary Carcinoids Versus Pulmonary Hamartomas

“…This can be helpful to differentiate PCs from hamartomas 12 . A TC with an extensive oncocytic component showing an intense 18 F-FDG uptake was demonstrated in individual case reports by several investigators 17,19 . Suemitsu et al reported a TC with distant metastasis showing high 18 F-FDG uptake at the primary site and liver metastasis 3 .…”

“…Despite many publications about 18 F-FDG PET/CT imaging of lung malignancies, the studies include a limited number of PC patients 3, [13][14][15][16][17][18][19] . There are several reports demonstrating 18 F-FDG avid TCs 3,17,19 and ACs 13 . ACs have a tendency to show sufficiently high 18 F-FDG uptake because of their higher mitotic count, while pulmonary hamartomas show no or low uptake.…”

Bronchial Oncocytoma With High 18F-Fluorodeoxyglucose Uptake Revealed by Nephrotic Syndrome

“…In particular, the intense uptake on 18F-FDG/PET of the oncocytic tumor might be associated with oncocytic component. In fact, as previously described by Kadowaki et al 4 the overexpression of mitochondria and glucose transporter protein (Glut)-1 in oncocytic cells is strongly correlated with the high 18F-FDG uptake (Fig. 3A-C); however, this mechanism is not yet fully understood.…”

“…Surprisingly, the preoperative PET-CT scan characterized the RIL oncocytoma with a high SUV, in contrast with evidence normally reported by other studies. 3 Although a case of PETpositive lung oncocytic carcinoid has been described, 4 to the best of our knowledge, this is the first case ever reported of lung oncocytoma with high SUV at preoperative PET staging . In particular, the intense uptake on 18F-FDG/PET of the oncocytic tumor might be associated with oncocytic component.…”

Sinonasal oncocytic Schneiderian papilloma accompanied by intravascular lymphoma

“…Benign tumors with oncocytic components sometimes show avid FDG uptake and may present incidentally. [7,8] Therefore, it is difficult to rule out malignancy on FDG images when these are accompanied by other malignant tumors, especially systemic malignancy, such as lymphoma.…”