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Lymphatic Drainage Routes of the Gastric Cardia Visualized by Lymphoscintigraphy

¹ Department of Surgery, Academic Medical Center at the University of Amsterdam, Amsterdam, The Netherlands
² Department of Nuclear Medicine, Academic Medical Center at the University of Amsterdam, Amsterdam, The Netherlands
³ Department of Gastroenterology, Academic Medical Center at the University of Amsterdam, Amsterdam, The Netherlands

This study was undertaken to assess the feasibility of lymphoscintigraphy of the gastric cardia and to identify the incidence of paraesophageal lymphatic drainage, precluding total gastrectomy with esophagojejunostomy as a potentially curative therapy for gastric cardia cancer. Methods: Ten patients scheduled for esophagectomy with high-grade dysplasia or with esophageal cancer at least 3 cm above the esophagogastric junction were enrolled in this study. Preoperatively, 111 MBq of^99mTc-labeled nanocolloid (n = 5) or sulfur colloid (n = 5) were injected into the submucosa of the tumor-free cardia. Subsequently, lymphoscintigraphy in combination with CT was obtained. Locoregional lymph node stations were measured for radioactivity by a -probe intraoperatively and ex vivo in the resection specimen. Results: In each patient, at least 1 radioactive lymph node station was detected. In total, 42 radioactive lymph node stations were detected by -probe. Of those 42 areas, 38 (90%) were visible at preoperative lymphoscintigraphy. In the group of 5 patients in whom nanocolloid was used, a median of 2 (range, 1–4) node stations per patient was identified, whereas when sulfur colloid was administered a median of 6 (range, 4–8) active lymph node stations per patient could be detected (P < 0.002). Paraesophageal drainage was identified in 1 patient. Conclusion: Lymphoscintigraphy of the gastric cardia is feasible and can accurately determine the location of radioactive lymph nodes. Early paraesophageal lymphatic drainage is rare.

Key Words: lymphoscintigraphy • lymph flow • gastric cardia carcinoma • esophagus

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