1. What is the optimal distal resection margin for esophageal carcinoma?
Alan G Casson, S.Jane Darnton, PhD, Sujata Subramanian, Louise Hiller, BSc 
The Annals of Thoracic Surgery 
Volume 69, Issue 1, Pages (January 2000)
DOI: /S (99)01262-X

2. Fig 1
(A) Overall survival for all patients. (B) Overall survival for all patients by stage. From top to bottom, stage I (upper solid black line); stage IIA/B (upper short broken line); stage III (alternating dash/dots); stage IV (lower long broken line).
The Annals of Thoracic Surgery  , DOI: ( /S (99)01262-X)

3. Fig 2
Overall survival for all patients by distal resection margin status. Patients with histologically positive distal resection margins (n = 24; solid line) had a trend toward reduced survival (p = 0.17, not significant) compared to patients with negative margins (n = 165; broken line).
The Annals of Thoracic Surgery  , DOI: ( /S (99)01262-X)