Esophagus (including GE junction) Squamous
C150 Cervical esophagus
C151 Thoracic esophagus
C152 Abdominal esophagus
C153 Upper third of esophagus
C154 Middle third of esophagus
C155 Lower third of esophagus
C158 Overlapping lesion of esophagus
C159 Esophagus, NOS
C160 Cardia, esophagogastric junction (EGJ)
**Note 1:** The following sources were used in the development of this schema
* SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998) (https://seer.cancer.gov/archive/manuals/EOD10Dig.3rd.pdf)
* SEER Summary Staging Manual-2000: Codes and Coding Instructions (https://seer.cancer.gov/tools/ssm/)
* Collaborative Stage Data Collection System, version 02.05: https://cancerstaging.org/cstage/Pages/default.aspx
* Chapter 16 *Esophagus and Esophagogastric Junction*, in the AJCC Cancer Staging Manual, Eighth Edition (2017) published by Springer International Publishing. Used with permission of the American College of Surgeons, Chicago, Illinois.
**Note 2:** Cancers involving the EGJ that have their epicenter within the proximal 2 cm of the cardia (Siewert types I/II) are to be staged as esophageal cancers (see Esophagus GE Junction schema). Cancers whose epicenter is more than 2 cm distal from the EGJ, even if the EGJ is involved, will be staged using the stomach cancer TNM and stage groupings.
**Note 3:** *Schema Discriminator 1: EsophagusGEJunction (EGJ)/Stomach* is used to discriminate between EsophagusGEJunction and Stomach which are coded to ICD-O-3 code C160.
**Note 4:** This schema is for squamous and adenosquamous histologies only. Adenocarcinomas and other histologies are collected in the Esophagus (including GE junction) (excluding Squamous) schema.