Clinical value of lung scintigraphy with Tc-99m gluconate in distinguishing benign from malignant lung diseases.
One hundred patients were studied with three-phase lung scintigraphy with Tc-99m gluconate. The results showed that there were statistically significant differences between benign and malignant lung lesions in the intensity of accumulation, the blood supply index ratio, and the radioactive uptake ratio. However, no difference was observed between the benign lung lesions and the healthy lungs. Analysis of false negatives and false positives revealed that false negatives had something to do with the cell types of the malignancies, in addition to the relatively small size of the lesions; the false positives were mostly caused by acute inflammation, for which obstructive pneumonitis might be responsible in part. It is concluded that Tc-99m gluconate is tumor-avid and can be used as an agent for positive imaging of lung cancer, because quantitative parameters, blood supply index ratio, and radioactive uptake ratio are more objective in distinguishing malignant lung lesions from benign ones, and are of relatively higher sensitivity and specificity. Thus, lung scintigraphy with Tc-99m gluconate provides an efficient supplementary measure for differentiating between malignant and benign lung lesions.
Xie
C
C
Department of Internal Medicine, First Affiliated Hospital, Sun Yat-Sen University of Medical Sciences, Guangzhou, People's Republic of China.
Li
Y
Y
Zhang
C
C
Zeng
S
S
D000230:Adenocarcinoma / Q000000981:diagnostic imaging / Q000453:epidemiology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging / Q000453:epidemiology; D003937:Diagnosis, Differential; D005942:Gluconates; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008171:Lung Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology; D008175:Lung Neoplasms / Q000000981:diagnostic imaging* / Q000453:epidemiology; D008875:Middle Aged; D015609:Organotechnetium Compounds; D011237:Predictive Value of Tests; D011877:Radionuclide Imaging; D012680:Sensitivity and Specificity
D005942:Gluconates; D015609:Organotechnetium Compounds; C032080:technetium Tc 99m gluconate