Carcinomas involving the esophagogastric junction

Area of Science:

• Gastroenterology
• Surgical Oncology
• Pathology

Background:

• Malignant lesions of the esophagogastric junction present challenges in surgical treatment categorization.
• A clear definition and classification system are needed to differentiate between carcinomas significantly involving the esophagogastric junction (ECJ-Ca) and those of the gastric cardia with less significant involvement (eC-Ca).

Purpose of the Study:

• To propose a practical definition and classification criteria for esophagogastric junction carcinomas (ECJ-Ca) and gastric cardia carcinomas (eC-Ca).
• To introduce the EGJ-Index as a tool for classifying these lesions.
• To conduct a comparative analysis of carcinomas in these defined groups.

Main Methods:

• Development of the EGJ-Index formula: EGJ-Index = [(Length of esophageal portion of lesion) / (Total lesion length)] x 1,000.
• Classification of lesions into three categories based on EGJ-Index values: ECJ-Ca (250-750), eC-Ca (0-249), and C-Ca (0).
• Comparative analysis of carcinomas within these defined groups.

Main Results:

• Established three practical categories for classifying esophagogastric junction and gastric cardia carcinomas.
• Identified 59 cases of ECJ-Ca (EGJ-I: 250-750), 88 cases of eC-Ca (EGJ-I: 0-249), and 208 cases of C-Ca (EGJ-I: 0).
• The proposed EGJ-Index demonstrated suitability for practical clinical use.

Conclusions:

• The EGJ-Index provides a practical and effective method for categorizing malignant lesions involving the esophagogastric junction.
• This classification system aids in avoiding confusion and standardizing surgical treatment approaches for ECJ-Ca and eC-Ca.
• The study validates the utility of the EGJ-Index in distinguishing and managing upper gastrointestinal cancers.