Regarding the pathological features and epidemiology of gastric carcinoma, all of the following are TRUE EXCEPT:

Question

Accepted Answer

D. Diffuse type gastric carcinoma typically presents at an earlier stage with better prognosis than intestinal type. ## Gastric Carcinoma: Lauren Classification & Prognosis

### Correct Answer Analysis
**Diffuse type gastric carcinoma presents at a LATER stage with WORSE prognosis**, not earlier stage with better prognosis. This is a critical distinction in gastric cancer pathology.

### Lauren Classification

| Feature | Intestinal Type | Diffuse Type |
|---------|-----------------|---------------|
| **Histology** | Well-formed glands, cohesive cells | Scattered individual cells, signet rings |
| **Stage at Presentation** | Earlier (localized) | Later (advanced, infiltrative) |
| **Prognosis** | Relatively better | Worse |
| **Risk Factors** | H. pylori, chronic atrophic gastritis, intestinal metaplasia | Genetic predisposition, CDH1 mutations (hereditary diffuse) |
| **Progression** | Correa cascade (chronic gastritis → atrophy → metaplasia → dysplasia → carcinoma) | De novo development, no clear precursor |
| **Common Sites** | Antrum, lesser curve | Fundus, greater curve, diffuse involvement |

### Key Pathological Points

**Key Point:** Intestinal-type adenocarcinoma follows the **Correa cascade** — a well-established multi-step progression from chronic H. pylori-induced atrophic gastritis through intestinal metaplasia and dysplasia to invasive carcinoma [cite:Robbins 10e Ch 17].

**Key Point:** Diffuse-type carcinoma, particularly signet ring cell variant, is characterized by loss of E-cadherin (CDH1 gene mutations) leading to poor cell-cell adhesion, deep infiltration, and advanced stage at diagnosis.

**High-Yield:** Signet ring cell carcinoma is a **diffuse-type variant** — cells lack cohesion, infiltrate deeply into the submucosa and muscularis, and have the worst prognosis among gastric adenocarcinomas (5-year survival <10%).

**Clinical Pearl:** Diffuse-type cancers are often detected late because they lack a discrete mass and present with linitis plastica ("leather bottle stomach") — diffuse wall thickening with poor distensibility.

### Why the Distractors Are Correct

- **Option 0 (Intestinal type + chronic atrophic gastritis):** TRUE — the Correa cascade is the established pathogenic pathway.
- **Option 2 (H. pylori + intestinal type):** TRUE — H. pylori is a Class 1 carcinogen and the strongest risk factor for intestinal-type gastric cancer.
- **Option 3 (Signet ring + diffuse type + poor prognosis):** TRUE — signet ring cell carcinoma is a diffuse-type variant with the worst outcomes.

Answer

A. Intestinal type gastric carcinoma is associated with chronic atrophic gastritis and intestinal metaplasia

Answer

B. Signet ring cell carcinoma is a variant of diffuse type gastric carcinoma with poor prognosis

Answer

C. Helicobacter pylori infection is a major risk factor, particularly for intestinal-type adenocarcinoma

Regarding the pathological features and epidemiology of gastric carcinoma, all of the following are TRUE EXCEPT:

Explanation

Gastric Carcinoma: Lauren Classification & Prognosis

Correct Answer Analysis

Lauren Classification

Key Pathological Points

Why the Distractors Are Correct

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Feature	Intestinal Type	Diffuse Type
Histology	Well-formed glands, cohesive cells	Scattered individual cells, signet rings
Stage at Presentation	Earlier (localized)	Later (advanced, infiltrative)
Prognosis	Relatively better	Worse
Risk Factors	H. pylori, chronic atrophic gastritis, intestinal metaplasia	Genetic predisposition, CDH1 mutations (hereditary diffuse)
Progression	Correa cascade (chronic gastritis → atrophy → metaplasia → dysplasia → carcinoma)	De novo development, no clear precursor
Common Sites	Antrum, lesser curve	Fundus, greater curve, diffuse involvement