Postoperative recurrence of lung cancer: detection by whole-body gallium scintigraphy

The records were reviewed of 111 consecutive patients who had lung cancer resected and who were followed with serial postoperative whole-body gallium scans. Scans were obtained preoperatively at intervals of 3-6 months for about 1 year after surgery and subsequently at yearly intervals. The period of follow-up varied from 1 1/2 to 8 years. Of 55 patients who developed tumor recurrence, a gallium scan was the first indicator of recurrence in 11 (20%) and was judged helpful in confirming or localizing a recurrence in another 14 patients (25%). False-positive rates were determined from 175 postoperative scans in the other 56 patients who did not suffer recurrence. Of these 175 scans, 15 (9%) demonstrated abnormalities that were sufficiently suspicious that an additional diagnostic procedure, other than chest radiography, was performed for clarification. However, in no case did the gallium scan result adversely affect the management of the patient. Our data demonstrate that routine postoperative whole-body gallium scanning can facilitate early detection of recurrence in some cases. Judicious use of gallium scanning in cases with clinically suspected recurrence can enable prompt localization, diagnosis, and treatment of recurrent tumor.
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