Collaborative Stage Data Set - Revised 8/7/2013
EsophagusGEJunction
EsophagusGEJunction
C16.0, C16.1, C16.2
- DISCONTINUED SITE-SPECIFIC FACTORS: SSF3, SSF4, SSF5
- C16.0 Cardia, esophagogastric junction (EGJ)
- C16.1 Fundus of stomach, proximal 5 centimeters (cm) only
- C16.2 Body of stomach, proximal 5 cm only
- Note 1: The cardia/EGJ and the proximal 5 cm of the fundus and body of the stomach have been removed from the Stomach chapter and added to the Esophagus chapter effective with AJCC TNM 7th Edition. Due to differences between the schemas for Esophagus and Stomach, a new schema was created in CSv2 to accommodate these changes. Since primary site codes C16.1 (fundus of stomach) and C16.2 (body of stomach) can be assigned to either schema, EsophagusGEJunction or Stomach, a schema discriminator field is needed for the CS algorithm to determine which schema to select.
In AJCC 7th Edition, cancers with a midpoint in the lower thoracic esophagus, in the EGJ, or within the proximal 5 cm of the stomach (cardia) and extending into the EGJ or esophagus, are staged similarly to cancers of the esophagus. All other cancers with a midpoint in the stomach greater than 5 cm distal to the EGJ, or those within 5 cm of the EGJ but not extending into the EGJ or esophagus, are staged using the gastric cancer staging system.
- Note 2: Effective with AJCC TNM 7th Edition, there are separate stage groupings for squamous cell carcinoma and adenocarcinoma of the esophagus. Since squamous cell carcinoma typically has a poorer prognosis than adenocarcinoma, a tumor of mixed histopathologic type or a type that is not otherwise specified should be classified as squamous cell carcinoma.
- Note 3: Effective with AJCC TNM 7th Edition, histologic grade is required for stage grouping.