Siewert classification of gastroesophageal (GE) junction tumors

Type

Location

Type I

Tumor center located 1–5 cm above the GE junction in the distal esophagus.

Type II

Tumor center located 0–1 cm above to 2 cm below the GE junction.

Type III

Tumor center located 2–5 cm below the GE junction in the proximal stomach (subcardial region).

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