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Microscope-integrated lymphangiography is a useful method in the field of lymphatic supermicrosurgery. Fluorescence based on indocyanine green (ICG) is the most commonly used. Fluorescein sodium is a fluorescent tracer used for retinal and neurosurgical angiography but not yet for lymphatic supermicrosurgery. In this report, we present a case in which the fluorescein sodium fluorescence microscope-integrated lymphangiography was used for assessment of lymphatic drainage pathway and patency in a patient treated for secondary lymphedema by lymphaticovenular anastomoses. Fluorescein sodium fluorescence microscope-integrated lymphangiography was evaluated in a 67-year-old female presented for a Campisi clinical stage IV lymphedema of the upper limb. Transcutaneous guidance and vascular fluorescence were assessed. A comparison with ICG fluorescence was made intraoperatively. Two lymphaticovenular anastomoses were performed and their patency were checked by lymphangiography. Transcutaneous signal was found higher with fluorescein sodium fluorescence. Intraluminal visualization was possible with fluorescein sodium coloration during lymphaticovenular anastomoses. No adverse reaction occurred. The circumferential differential reduction rate of affected limb was 8.1% 3 months after lymphaticovenular anastomoses. The use of fluorescence microscope-integrated lymphangiography with fluorescein sodium may be superior to ICG fluorescence in assistance of lymphaticovenular anastomoses. © 2015 Wiley Periodicals, Inc. Microsurgery 35:407–410, 2015.