[Detection of mediastinal lymph node metastasis from lung cancer with positron emission tomography (PET) using 11C-methionine].
Twenty-five patients with primary non-small cell lung cancer underwent the positron emission tomography (PET) using 11C-methionine to detect the mediastinal lymph node metastasis. We introduced the positron angiography to recognize precisely the anatomical orientation of the mediastinal lymph nodes. The 11C-uptake of the lymph node was expressed with distribution absorption ratio (DAR). A total 107 lymph nodes were examined. The average DAR in metastatic lymph nodes (n = 28) was 3.89 while that of non-metastatic nodes (n = 79) was 2.38 indicating a significant difference (p < 0.001). The most adequate threshold for detection of metastasis was 3.3 with sensitivity of 100%, and specificity of 87.3% and overall accuracy of 89.7%. Metastasis of squamous cell carcinoma was diagnosed more accurately than that of adenocarcinoma. Thus, PET using 11C-methionine may offer a new method to detect the mediastinal lymph node metastasis from lung cancer.
Miyazawa
H
H
Department of Surgery, National Nakano Chest Hospital, Tokyo, Japan.
Arai
T
T
Inagaki
K
K
Morita
T
T
Yano
M
M
Hara
T
T
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D002250:Carbon Radioisotopes; D002289:Carcinoma, Non-Small-Cell Lung / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D008198:Lymph Nodes / Q000000981:diagnostic imaging* / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008482:Mediastinum; D008715:Methionine; D008875:Middle Aged; D014055:Tomography, Emission-Computed
D002250:Carbon Radioisotopes; D008715:Methionine