gastrinoma triangle
An anatomical region where most duodenal and pancreatic gastrinomas are located during surgical exploration.
Full Definition
The gastrinoma triangle is a well-defined anatomical area that encompasses the most common locations of gastrin-secreting neuroendocrine tumors. The triangle's boundaries include the confluence of the cystic and common hepatic ducts superiorly, the junction of the second and third portions of the duodenum inferiorly, and the junction of the neck and body of the pancreas medially. Approximately 90% of sporadic gastrinomas are found within this triangular region. This anatomical landmark is crucial for surgical planning during exploration for gastrinoma resection, as it guides the surgeon's search pattern. Understanding this concept is essential for both surgical and medical oncologists managing Zollinger-Ellison syndrome.
Usage
Usage note: Also known as Passaro triangle after the surgeon who described it.
In Context
- "Intraoperative exploration focused on the gastrinoma triangle to locate the primary tumor." — Surgical report
- "Endoscopic ultrasound identified a small lesion within the gastrinoma triangle consistent with duodenal gastrinoma." — Endoscopy report