Target Volume Determination 2015

GTV-N definition:CT Scan

NODES : Size, border, density, central fatty hilum • LIMITATIONS: • Lymphnoda l metastases adjacent to the esophageal wall are not visible • Dimensional criterion can be not sufficient for all cases: • Metastases have been found in lymphnodes lower than 7mm in larger diameter • Lymphnodes > 1 cm may be enlarged by inflammation

• Reported overall accuracy < 60% for mediastinal lymph nodes, from 39% to 74% in coeliac and abdominal lymph nodes

Picus D – Radiology – 1983 Plukker JThM – Best Pract Res Clin Gastroenterol – 2006 Patel AN – Surg Clin North Am – 2005