Hereditary diffuse gastric cancer: diagnosis and management

Clinical Gastroenterology and Hepatology : the Official Clinical Practice Journal of the American Gastroenterological Association
Vanessa BlairParry Guilford

Abstract

Hereditary diffuse gastric cancer (HDGC) is a familial cancer syndrome defined by germline mutation of the E-cadherin gene (CDH-1). The cumulative risk for advanced gastric cancer in HDGC is 67% in men and 83% in women by 80 years of age. Early HDGC is characterized by multiple microscopic foci of intramucosal signet-ring cell carcinoma. The time to progression of these foci appears to be variable and currently is not predictable--the carcinoma foci may remain confined to the mucosa for many years. The management options for mutation carriers include prophylactic gastrectomy or surveillance gastroscopy. The only extensive published surveillance experience used chromogastroscopy, which detected early HDGC foci not visible on white-light endoscopy. The use of new techniques such as confocal microscopy, spectroscopy, or autofluorescence may prove useful, but have not been studied in HDGC. In patients up to 20 years of age, the risk for gastric cancer is less than 1%; this risk is outweighed by the mortality and morbidity associated with total gastrectomy. It is therefore recommended that genetic testing should occur at 16 years of age and that annual surveillance chromogastroscopy also should begin at age 16 in identified CDH-1 mu...Continue Reading

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