Site: Upper GI

Inclusion Criteria:

• Control Arm
• No History of HNC/Stomach Cancer Prior to Esphogeal Cancer
• No Rare Cancers in Controls
• Not Sequenced
• Has Unextracted Buccal
• Has Pre-DX Unextracted Buccal
• Matched at a 2-1 ratio

Matching Factors:

• Race (W/B/O)
• Gender
• Year of Birth
• Year of Collection

Match Ratio: 2 to 1

Match Technique: Individual matching only non-cases as controls.

Analytes:

Number of Cases: 17

Number of Controls: 34

---