Imaging of head and neck tumors with positron emission tomography and [11C]methionine.
OBJECTIVE
To evaluate the value of positron emission tomography and [11C]methionine in imaging of malignant tumors of the head and neck region.


METHODS
Forty-seven tumors of the head and neck were investigated with 11C-labeled methionine and positron emission tomography before treatment. Because of the resolution limits of the positron emission tomography scanner, all tumors selected for the study were larger than 1 cm in diameter.


RESULTS
Forty-two (91%) of the 46 malignant tumors were clearly visible in the positron emission tomography image (squamous cell carcinoma, n = 26; lymphoma, n = 9; adenocystic carcinoma, n = 2; lymphoepithelioma, n = 1; adenocarcinoma, n = 1; transitional cell carcinoma, n = 1; esthesioneuroblastoma, n = 1; plasmocytoma, n = 1), while three (7%) squamous cell carcinomas were visible, but less easy to detect due to physiological accumulation of the tracer in the area under observation. Only one (2%) squamous cell carcinoma could not be delineated from the positron emission tomography image, and there was no uptake of [11C]methionine in a benign pleomorphic adenoma. No correlation was found between the uptake of [11C]methionine and the histological grade in the subset of squamous cell carcinoma (n = 30). High physiological uptake of [11C]methionine was observed in the salivary glands and the bone marrow.


CONCLUSIONS
Malignant head and neck tumors can be effectively imaged with positron emission tomography using [11C]methionine as the tracer.
Leskinen-Kallio
S
S
Department of Oncology and Radiotherapy, Turku University Central Hospital, Finland.
Lindholm
P
P
Lapela
M
M
Joensuu
H
H
Nordman
E
E
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002250:Carbon Radioisotopes; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008223:Lymphoma / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D008715:Methionine / Q000493:pharmacokinetics; D008875:Middle Aged; D014055:Tomography, Emission-Computed
D002250:Carbon Radioisotopes; D008715:Methionine