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Table 1 Siewert’s classification for adenocarcinomas of GEJ

From: Clinical management of gastroesophageal junction tumors: past and recent evidences for the role of radiotherapy in the multidisciplinary approach

Siewert type Epicenter of the lesion
I Within 1 to 5 cm above the anatomic GEJ
II Within 1 cm above and 2 cm below the GEJ (i.e. true carcinoma of the cardia)
III Between 2 to 5 cm below the GEJ, infiltrating GEJ and esophagus from below (subcardial carcinoma)
  1. [GEJ: Gastroesophageal Junction].