In a 48-year-old woman with established cirrhosis, portal hypertension develops with formation of portosystemic collaterals. Which is the most common site of variceal formation in portal hypertension?

Question

Accepted Answer

B. Lower third of esophagus. ## Most Common Site of Varices in Portal Hypertension **Key Point:** The lower third of the esophagus is the most common site of variceal formation in portal hypertension, accounting for 70–80% of all variceal bleeding in cirrhotic patients. ### Anatomy of Portosystemic Collaterals ```mermaid flowchart TD A[Portal Hypertension]:::outcome --> B[Increased portal pressure > 12 mmHg]:::outcome B --> C{Collateral Formation Sites}:::decision C -->|Esophageal varices| D[Lower 1/3 esophagus
Left gastric vein → azygos]:::action C -->|Gastric varices| E[Fundus & cardia
Short gastric veins]:::action C -->|Rectal varices| F[Rectum/sigmoid
Superior rectal → middle rectal]:::action C -->|Duodenal varices| G[Rare: duodenum
Gastroduodenal vein]:::action D --> H[Most common bleeding site]:::urgent ``` ### Frequency of Variceal Sites in Cirrhosis | Site | Frequency | Bleeding Risk | Mortality if Bleeds | |------|-----------|---------------|---------------------| | **Esophageal (lower 1/3)** | **70–80%** | **High (40–50% bleed)** | **20–30%** | | Gastric fundus | 15–20% | High | 25–35% | | Rectal | 5–10% | Low | Low | | Duodenal | <2% | Very rare | High if occurs | | Ectopic (jejunal, colonic) | <1% | Rare | Variable | **High-Yield:** Esophageal varices are the most common and most clinically significant. They form because: 1. The left gastric (coronary) vein drains the lower esophagus into the portal vein 2. Under portal hypertension, flow reverses and dilates esophageal submucosal veins 3. These thin-walled varices lie in a high-pressure, low-compliance region (esophageal mucosa) 4. Mechanical trauma from food/swallowing triggers rupture ### Why Esophageal Varices Bleed Most Often **Clinical Pearl:** Esophageal varices are responsible for 80–90% of all variceal hemorrhage in cirrhotic patients. Gastric varices, though less common, have a higher mortality per bleed (25–35% vs. 20–30%) because they are deeper and harder to endoscopically treat. **Mnemonic: ESOPHAGEAL VARICES FIRST** — **E**sophageal (lower third), **S**ubmucosal location, **O**pen to trauma, **P**ortal hypertension drives flow, **H**igh bleeding frequency, **A**zygos drainage, **G**astric secondary, **E**ctopic rare, **A**lways screen endoscopically, **L**arge varices = high risk. ### Clinical Significance - **Screening:** Upper endoscopy is the gold standard for detecting esophageal varices in all cirrhotic patients - **Prophylaxis:** Beta-blockers (propranolol, carvedilol) reduce portal pressure and prevent first variceal bleed - **Treatment:** Endoscopic variceal ligation (EVL) is superior to sclerotherapy for esophageal varices [cite:Robbins 10e Ch 18]

Answer

A. Rectum and sigmoid colon

Answer

C. Duodenum and jejunum

Answer

D. Gastric fundus and lesser curve

In a 48-year-old woman with established cirrhosis, portal hypertension develops with formation of portosystemic collaterals. Which is the most common site of variceal formation in portal hypertension?

Explanation

Most Common Site of Varices in Portal Hypertension

Anatomy of Portosystemic Collaterals

Frequency of Variceal Sites in Cirrhosis

Why Esophageal Varices Bleed Most Often

Clinical Significance

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Site	Frequency	Bleeding Risk	Mortality if Bleeds
Esophageal (lower 1/3)	70–80%	High (40–50% bleed)	20–30%
Gastric fundus	15–20%	High	25–35%
Rectal	5–10%	Low	Low
Duodenal	<2%	Very rare	High if occurs
Ectopic (jejunal, colonic)	<1%	Rare	Variable