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European Journal of Cardio-Thoracic Surgery, Vol 11, 214-217, Copyright © 1997 by European Association for Cardio-thoracic Surgery
R Crisci, E Di Cesare, L Lupattelli and GF Coloni
OBJECTIVE: In several previous studies, including one of our own, CT and
MRI provided similar information on N2 detection in the staging of lung
cancer. Both imaging techniques can be considered effective in detecting
enlarged mediastinal lymph nodes but the results are often inaccurate when
confronted with pathological findings. The purpose of this study was to
assess the diagnostic accuracy of gadolinium-DTPA enhanced MRI in the
detection of mediastinal lymph nodes in lung cancer. METHODS: A prospective
study to compare standard unenhanced MRI and Gd-DTPA enhanced MRI was
carried out in patients with diagnosed lung cancer. The study focused on
the status of mediastinal lymph nodes. Gd-DTPA was administered at a dosage
of 0.2 mmol2/KG before T1 weighted sequences. Qualitative visual analyses
of both standard and contrast enhanced MRI images were performed on each
patient by 2 independent radiologists. The imaging results were then
compared to pathological findings obtained after surgical operation.
RESULTS: In the identification of mediastinal lymph node metastases
standard MRI was 62% sensitive, 100% specific and 74% accurate whereas
Gd-DTPA enhanced MRI was 100% sensitive, 91% specific and 97% accurate.
CONCLUSIONS: Gd-DPTA enhanced MRI was more accurate than standard MRI in
the detection of metastatic lymph nodes in patients with lung cancer. These
initial results can be considered encouraging especially with regards to
the reduction of false negative findings although further confirmation is,
understandably, required.
ARTICLES
MR study of N2 disease in lung cancer: contrast-enhanced method using gadolinium-DTPA
Department of Thoracic Surgery, University of L'Aquila, Italy.
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