ID 73983
Author
Toba, Hiroaki Department of Thoracic and Endocrine Surgery and Oncology, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Kondo, Kazuya Department of Thoracic and Endocrine Surgery and Oncology, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Otsuka, Hideki Department of Radiology, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Takizawa, Hiromitsu Department of Thoracic and Endocrine Surgery and Oncology, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Kenzaki, Koichiro Department of Thoracic and Endocrine Surgery and Oncology, Institute of Health Biosciences, the University of Tokushima Graduate School
Sakiyama, Shoji Department of Thoracic and Endocrine Surgery and Oncology, Institute of Health Biosciences, the University of Tokushima Graduate School
Tangoku, Akira Department of Thoracic and Endocrine Surgery and Oncology, Institute of Health Biosciences, the University of Tokushima Graduate School Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Keywords
fluorodeoxyglucose-positron emission tomography and computed tomography scan
computed tomography scan
lung cancer
lymph node metastasis
diagnosis
Content Type
Journal Article
Description
Objectives : We evaluate whether integrated fluorodeoxyglucose-positron emission tomography and computed tomography (FDG-PET/CT) scan can diagnose the presence of lymph node metastasis more accurately than computed tomography (CT) scan alone. Methods : Forty-two patients with lung cancer preoperatively underwent integrated PET/CT scan using FDG and CT scan and underwent pulmonary resection and lymph node dissection. We judged cases as lymph node metastasis if the lymph node visually accumulated FDG at PET/CT scan and measured 1 cm or greater in the short axis at CT scan. We retrospectively analyzed whether our judgments in each modality were consistent with the pathological diagnosis. Results : Two-hundred and seventeen stations of lymph node were dissected and 21 stations (9.7%) were histologically diagnosed as positive metastasis. Thirty-two stations of lymph node visually accumulated FDG at PET/CT scan and 17 stations measured 1 cm or greater in the short axis at CT scan. Concerning the diagnosis of lymph node metastasis, PET/CT scan showed significantly higher sensitivity than CT scan (81% vs. 48%, p=0.024). The false-positive rate was significantly high in PET-positive lymph nodes measuring less than 1 cm in diameter. There were 4 falsenegative lymph nodes with both scans. All of these were less than 7 mm in diameter and had a low percentage of metastatic foci in the lymph node. Concerning the diagnosis of N staging, there was no significant difference between PET/CT scan and CT scan (83% vs. 69%, p=0.124). However, the identification of N2 disease at PET/CT scan was significantly more accurate than that at CT scan (100% vs. 38%, p=0.031). Conclusions : PET/CT is superior to CT scan in lymph node staging. However, because the false-positive rate is high in PET-positive lymph nodes measuring less than 1 cm in diameter, we think that clinical background should be considered and other modalities or histological examinations should be undertaken if necessary.
Journal Title
The journal of medical investigation : JMI
ISSN
13431420
NCID
AA11166929
Volume
57
Issue
3-4
Start Page
305
End Page
313
Sort Key
305
Published Date
2010-08
Remark
The journal of medical investigation : http://medical.med.tokushima-u.ac.jp/jmi/index.html
EDB ID
FullText File
language
eng
departments
Medical Sciences