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Syndrome reference sheet
Generated 12 Oct 2026
Oncology · Oncology / Hereditary cancer syndromes

Hereditary diffuse gastric cancer syndrome

Also known as: HDGC

Germline CDH1 mutations causing diffuse gastric and lobular breast cancer.

Medical specialty
Oncology
Subspecialty
Oncology / Hereditary cancer syndromes
Sex & age distribution
Male: affected; Female: affected, with lobular breast cancer; Children: rare
Gene(s) involved
CDH1, CTNNA1

Etiology & mechanism

E-cadherin loss.

Gene(s) involved (2)

CDH1CTNNA1

Symptoms & signs (5)

diffuse gastric cancerdysphagialobular breast cancersignet ring cellsweight loss
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