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99mTc-Dextran Lymphoscintigraphy SPECT/CT Unveils the Hidden Leakage Site in Recurrent Chylothoraxes
Xiaotian Xia1, Fuqiang Shao1, Fan Hu1
1Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China.
Abstract:
Chylothorax is defined as the accumulation of chyle in the pleural space, mainly by damaging to the thoracic duct. 99mTc-Dextran is a relatively new tracer for lymphoscintigraphy. A 40-year-old woman had recurrent chylothoraxes after thymoma resection and ligation of the thoracic duct owing to intraoperative suspected thoracic duct injury. She underwent lymphoscintigraphies using 99mTc-sulfur colloid and 99mTc-dextran, respectively, to identify the possible leakage site of the thoracic duct. The images showed increased 99mTc-dextran but unimpressive 99mTc-sulfur colloid activity at the leakage site. Based on the results, this patient received surgery anastomosing the thoracic duct and the azygos vein.
