Pathological analysis of clinical target volume margin for radiotherapy in patients with esophageal and gastroesophageal junction carcinoma

Conclusions: The extent of microscopic spread within esophagus (recommended CTV margin) was <30 mm in about 94% of cases of esophageal cancer, except for distal microscopic spread in GEJ adenocarcinoma, in which 50 mm was needed to cover about 94% of cases.