This operative video demonstrates a robotic partial gastrectomy performed for a gastrointestinal stromal tumor (GIST) of the gastric fundus.

The patient is a 59-year-old woman who presented with an enlarging gastric mass consistent with a gastrointestinal stromal tumor on prior biopsy.

The patient underwent robotic staging laparoscopy followed by robotic partial gastrectomy.

Intraoperative evaluation demonstrated a 2.5 cm exophytic lesion arising from the anterior aspect of the gastric fundus. The tumor was elevated and resected using a robotic stapled wedge resection.

Frozen section analysis demonstrated a close margin at the staple line, and therefore the staple line was re-excised to obtain an additional margin. The gastrotomy was then closed transversely with a running hand-sewn suture.

An intraoperative upper endoscopy was performed to evaluate the gastric lumen and the repair. The stomach was insufflated while the repair site was submerged intra-abdominally, and a hydropneumatic leak test confirmed the integrity of the closure.

The patient tolerated the procedure well and was discharged home on postoperative day two.

Final pathology demonstrated:

• Gastrointestinal stromal tumor, spindle cell type

• Tumor size 4.5 cm

• Mitotic rate <5 per 5 mm²

• Very low risk category

• All margins negative for tumor

This case demonstrates the application of robotic minimally invasive techniques for gastric GIST resection, including precise tumor localization, margin assessment, and intraoperative endoscopic evaluation.