Early gastric carcinoma with special reference to macroscopic classification.

Area of Science:

• Gastroenterology
• Oncology
• Surgical Pathology

Background:

• Early gastric carcinoma (EGC) diagnosis and treatment have evolved significantly.
• Understanding the characteristics of EGC is crucial for effective management.
• A large cohort study provides valuable insights into historical EGC trends.

Purpose of the Study:

• To analyze the clinical characteristics, macroscopic changes, and chronological progression of solitary early gastric carcinoma.
• To investigate the incidence, location, and age distribution of depressed versus elevated EGC types.
• To determine the relationship between invasion depth, lymph node metastasis, and survival rates in EGC.

Main Methods:

• Retrospective analysis of 1000 surgically treated solitary early gastric carcinoma cases.
• Classification of EGC into depressed and elevated types based on macroscopic appearance.
• Evaluation of invasion depth, lymph node metastasis, and 5-year survival rates.

Main Results:

• Early gastric carcinoma constituted one-third of all resected gastric carcinomas.
• Depressed type EGC was more common (1:4 ratio to elevated type) and predominantly located in the middle third of the stomach.
• Lymph node metastasis occurred in 12.7% of EGC cases, with higher rates in submucosal (21.7%) and elevated types (20.9%).
• 5-year survival rates were 93.8% for curative resection versus 56.5% for palliative resection.

Conclusions:

• Early gastric carcinoma exhibits distinct clinical and macroscopic features based on type and location.
• Lymph node metastasis is a significant prognostic factor in EGC, particularly for submucosal and elevated lesions.
• Curative surgical resection offers a high survival rate for early gastric carcinoma patients.