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Gastroenterology & Hepatology

Hereditary Diffuse Gastric Cancer (CDH1 mutation)

ICD-10 Code
C16.8

Hereditary Diffuse Gastric Cancer (CDH1 mutation) - Clinical guidelines.

Clinical Presentation & Protocol

Patient Usually Complains Of

Patient presents for surveillance/management of Hereditary Diffuse Gastric Cancer (HDGC) secondary to confirmed germline CDH1 mutation. Family history significant for [Number] first/second-degree relatives with diffuse gastric cancer or lobular breast cancer. Patient is currently [asymptomatic/reporting symptoms of dyspepsia, early satiety, or weight loss]. Genetic counseling completed; patient understands high lifetime risk of gastric malignancy and prophylactic surgical options.

Clinical Examination Findings

General: Patient appears [well-nourished/cachectic]. Abdomen: Soft, non-distended, non-tender to palpation. No palpable masses or organomegaly. Bowel sounds present and normoactive. Skin: No stigmata of neurofibromatosis or other syndromic features. Performance status: ECOG [0-1].

Treatment Protocol

Prophylactic total gastrectomy (PTG) recommended as gold standard for CDH1 mutation carriers. If surgery deferred, high-frequency endoscopic surveillance (every 6-12 months) via high-definition white-light endoscopy with extensive mapping biopsies (Cambridge protocol) is mandatory. Referral to surgical oncology, nutrition, and psychological support services initiated.

Detailed clinical guide coming soon.