Successful Laparoscopic Resection of Gastric Lymphangioma Under the Intraoperative Guidance of Indocyanine Green Fluorescence Imaging: A Case Report

Gastric lymphangioma (GLA) is an extremely rare tumor without an established therapeutic strategy. Surgical resection is considered the mainstay of treatment, although there is a high risk of local recurrence if negative margins are not achieved. A 51-year-old man underwent routine abdominal ultrasonography, which incidentally detected a 20-mm tumor adjacent to the lesser curvature of the stomach. GLA was suspected based on its polycystic appearance. After a 16-month monitoring period, laparoscopic resection was performed because of tumor growth and involvement of the left gastric artery. Intraoperative indocyanine green (ICG) navigation system revealed lymphatic drainage from the tumor, which we used to help determine the optimal excision line and minimize the loss of gastric volume. Pathological examination confirmed complete resection with negative margins and supported a diagnosis of lymphangioma. We performed laparoscopic radical resection of GLA under guidance from intraoperative ICG fluorescence imaging, which allowed us to maximize residual gastric volume.