Early signet ring cell gastric cancer

Area of Science:

• Gastroenterology
• Oncology
• Surgical Pathology

Background:

• Signet ring cell carcinoma (SRC) is a distinct histological subtype of gastric cancer.
• Clinicopathological features and patient outcomes for gastric SRC are not well-established.
• Controversy exists regarding the prognosis and management of gastric SRC.

Purpose of the Study:

• To compare clinicopathological characteristics and prognosis of gastric SRC with other histological types.
• To evaluate lymph node metastasis rates in early gastric SRC.
• To determine the suitability of less-invasive strategies for early gastric SRC.

Main Methods:

• Retrospective analysis of 2,439 gastric carcinoma patients undergoing gastrectomy (1994-2006).
• Comparison of 505 patients with SRC against 1,934 patients with non-SRC histological types.
• Analysis of tumor invasion depth, lymph node metastasis, and 5-year survival rates.

Main Results:

• Early gastric cancer was diagnosed in 29% of SRC patients versus 22.2% of non-SRC patients.
• No significant difference in regional lymph node metastasis was observed between early SRC and early non-SRC (10.7% vs. 16.0%).
• Five-year survival rates were significantly better for early SRC patients (96.1%) compared to early non-SRC patients (89.6%).

Conclusions:

• Early gastric SRC demonstrates a favorable prognosis.
• Lymph node metastasis rates do not significantly differ between SRC and other gastric cancer histological types.
• Less-invasive treatment approaches may be considered for select early gastric SRC cases.