Varicose Veins

Slide 1 · Varicose Veins

Venous hypertension, valvular incompetence, and tissue injury

Raised venous pressure

Venous dilation

Valve failure

Stasis and injury

Dr Abu Suraih Sakhri

MBBS, MD (Pathology)

www.abusuraihsakhri.com

Slide 2 · Learning objectives

Explain pressure-induced venous dilation and valve incompetence.

Connect venous congestion with skin changes and chronic ulcers.

Distinguish superficial varicosity complications from deep-vein thrombosis.

Trace the causes and consequences of esophageal varices and hemorrhoids.

Slide 3 · Why venous pathology deserves attention

Varicose veins and thrombophlebitis/phlebothrombosis dominate clinical venous disease.

Together, these conditions account for at least 90% of clinical venous disease.

Their principal hazards differ: Local tissue injury versus deep venous thromboembolism.

Slide 4 · Definition: Two linked anatomic abnormalities

A varicose vein is abnormally dilated and tortuous.

The initiating setting is prolonged elevation of intraluminal pressure.

Vessel dilation is followed by incompetence of venous valves.

Slide 5 · What dilation and tortuosity mean

Dilation: Enlargement of the venous lumen.

Tortuosity: Loss of a relatively straight course.

Both can coexist within the same superficial vessel.

Schematic: Superficial lower-limb vein

Dilated and tortuous

Slide 6 · Sustained pressure is the upstream driver

Prolonged venous hypertension loads the vessel wall.

Repeated or persistent distension produces enlarged superficial veins.

Valve incompetence compounds the resulting circulatory disturbance.

Prolonged pressure

Venous dilation

Valve incompetence

Slide 7 · The dependent leg is a vulnerable site

The superficial veins of the upper and lower leg are frequently involved.

Prolonged dependent posture markedly increases venous pressure.

The anatomic site and posture explain the pattern of susceptibility.

Schematic: Superficial lower-limb vein

Nondilated contour

Dependent direction

Slide 8 · How much can dependent pressure rise?

Leg venous pressures reaching up to ten times normal.

The comparison concerns prolonged dependent posture.

This is a pressure effect—not a diagnostic threshold for an individual patient.

Reference state

Normal venous pressure

(comparison baseline)

Prolonged dependency

Pressure may reach

Up to 10 × normal

Slide 9 · Venous valves normally enforce direction

Venous valves are arranged to favor directional return.

Coaptation is necessary to oppose reverse movement of blood.

Their failure is integral to varicose-vein pathogenesis.

Schematic

Leaflets approximate

Slide 10 · Venous distension defeats valve closure

Expansion separates the vessel walls and alters valve geometry.

Leaflets no longer close effectively: Venous valve incompetence.

Reverse flow and stasis then become possible.

Schematic

Incompetent closure

Slide 11 · A self-amplifying hemodynamic sequence

Elevated pressure causes dilation; Dilation compromises valves.

Incompetent valves fail to prevent congestion and stasis.

Persistent venous load reinforces clinically apparent varicosity.

Pressure ↑

Dilation

Valve failure

Stasis

Conceptual pathogenesis sequence

Slide 12 · Familial susceptibility is structural

A familial predisposition is recognized by Robbins.

The textbook attributes susceptibility to faulty development of the venous wall.

Familial risk can coexist with acquired elevations in venous pressure.

Slide 13 · Obesity increases varicose-vein risk

Obesity is specifically identified as a risk factor.

The clinical association fits the overarching problem of venous pressure loading.

Do not equate this risk factor with a single obligatory causal mechanism.

Slide 14 · Pregnancy: A pressure-loading mechanism

An enlarged uterus can compress the inferior vena cava.

This raises venous pressure in the lower extremities over prolonged periods.

Robbins invokes this mechanism to help explain increased frequency in women.

Gravid uterus

IVC compression

Venous pressure ↑

Leg varicosities

Slide 15 · Risk factors organize into two mechanisms

Predisposing influence

Robbins-supported mechanistic link

Prolonged dependency

Marked local venous pressure elevation

Pregnancy

Gravid uterine compression of the IVC

Familial susceptibility

Faulty development of the venous wall

Obesity

Increased risk; specific mechanism not detailed here

Slide 16 · How common are lower-limb varicosities?

Reported proportions describe varicose veins of the lower extremities.

Population described

Frequency reported by Robbins

Interpretive caution

Males

Up to 20%

Upper-bound estimate

Females

Approximately one-third

Textbook estimate; not an individual risk

Slide 17 · Risk pathways converge on one lesion

Constitutional wall susceptibility favors dilation.

External or posture-associated pressure loading favors dilation.

Both routes culminate in tortuous, valve-incompetent superficial veins.

Intrinsic tendency

Familial venous-wall

Susceptibility

Pressure loading

Dependency, obesity,

Pregnancy

Dilated, incompetent veins

Slide 18 · The clinical cascade begins at the valves

Valve incompetence impairs effective venous drainage.

Stasis and congestion are immediate functional consequences.

Edema, pain, and thrombosis can follow.

Valve failure

Stasis / congestion

Edema, pain, clot

Slide 19 · Stasis and congestion are related—not identical

Stasis denotes slowed or impaired venous blood movement.

Congestion denotes accumulation of blood from impaired venous drainage.

Both participate in lower-limb symptoms and tissue injury.

Slide 20 · Why dependent edema accompanies varicosities

Ineffective venous drainage promotes congestion.

Fluid accumulation produces edema in affected tissues.

Edema is a clinical manifestation of the underlying hemodynamic disturbance.

Valve incompetence

Impaired drainage

Congestion

Edema

Slide 21 · Pain is part of the clinical phenotype

Pain among the consequences of valvular incompetence.

Pain should be interpreted alongside visible varices, edema, and other complications.

Pain alone does not distinguish varicose disease from deep venous thrombosis.

Slide 22 · Thrombosis can complicate stagnant superficial veins

Stasis provides a local setting in which thrombosis can occur.

The text lists thrombosis among consequences of incompetent valves.

Superficial thrombosis must be distinguished from thrombosis of deep veins.

Schematic

Localized thrombus (conceptual)

Slide 23 · Superficial and deep venous disease differ

Feature

Superficial varicose veins

Deep-vein thrombosis

Core process

Chronic dilatation and valve incompetence

Thrombus formation in deep veins

Common consequences

Stasis, edema, skin injury

Potential pulmonary embolism

Embolism

Very rare from superficial varices

Relatively frequent from thrombosed deep veins

Slide 24 · The embolic-risk distinction is essential

Pulmonary embolism from the described superficial varicosities is very rare.

Thrombosed deep veins are a much more important source of thromboemboli.

Never use a superficial varix as proof that deep venous thrombosis is absent.

Superficial varicosity

Local stasis and tissue injury

Embolism: Very rare

Deep-vein thrombosis

Major source of pulmonary

Thromboembolism

Slide 25 · Case: Visible tortuous veins and leg heaviness

Hypothetical teaching case

An adult with obesity reports long periods standing. The lower-leg superficial veins are enlarged and tortuous, with dependent swelling.

Reasoning prompts

Which factors increase venous loading?

What structural change precedes valve failure?

How is edema related to the venous lesion?

Slide 26 · Persistent venous congestion impairs tissue oxygenation

Chronic venous congestion and poor drainage produce secondary tissue ischemia.

The mechanism concerns impaired local tissue oxygen delivery despite venous blood pooling.

Cutaneous damage becomes a downstream manifestation.

Chronic congestion

Poor venous drainage

Tissue ischemia

Skin injury

Slide 27 · Stasis dermatitis follows chronic venous congestion

Cutaneous inflammation and chronic change accompany impaired venous drainage.

The term stasis dermatitis for this consequence.

The characteristic discolored, indurated appearance is described as brawny induration.

Slide 28 · Why the skin becomes brown and indurated

Chronic venous hypertension favors red-cell extravasation into tissue.

Breakdown of extravasated erythrocytes produces iron pigment.

The pigment contributes to the brawny discoloration of stasis dermatitis.

Venous congestion

Extravasated RBCs

RBC breakdown

Brown pigment

Slide 29 · Hemosiderin links congestion to visible pigmentation

Hemosiderin deposits in venous leg ulcers.

The iron pigment is generated by breakdown of extravasated red cells.

Deposits can coexist with chronic inflammation in damaged skin.

Venous microenvironment

Congestion and vascular leakage

Tissue response

Red-cell breakdown → iron pigment

Slide 30 · Dermatitis and ulceration are linked stages

Change

Pathologic meaning

Clinical implication

Stasis dermatitis

Chronic skin effects of venous congestion

Brawny discoloration / induration

Venous ulcer

Loss of surface integrity in poorly perfused tissue

Difficult healing and infection risk

Slide 31 · Why chronic venous disease can ulcerate

Poor venous drainage creates secondary tissue ischemia.

Sustained tissue injury may lead to skin ulceration.

Severe varicose veins are one setting for venous leg ulcers.

Venous hypertension

Congestion

Hypoxia / ischemia

Ulceration

Slide 32 · A venous ulcer is a failure of local repair

Poor healing to inadequate oxygen delivery to the wound.

Obstructed venous drainage is listed as a factor impairing repair.

Ulcers may persist while the underlying circulatory problem remains.

Drainage obstruction

Oxygen delivery ↓

Impaired repair

Chronic ulcer

Slide 33 · Venous ulcers are not caused by varices alone

Chapter 3 also names congestive heart failure as a cause of chronic venous hypertension.

The immediate pathway is venous pressure elevation and poor tissue oxygenation.

An ulcer pattern identifies a mechanism, not always a single unique cause.

Slide 34 · Venous and arterial ulcers: Different upstream lesions

Question

Venous leg ulcer

Arterial ulcer

Primary disturbance

Chronic venous hypertension

Atherosclerotic arterial insufficiency

Tissue problem

Poor oxygen delivery / impaired drainage

Ischemia, atrophy, necrosis

Source emphasis

Often severe varicosity or CHF

Commonly peripheral arterial disease, often with diabetes

Slide 35 · Diabetic ulcers introduce additional mechanisms

Venous ulcer

Diabetic foot ulcer

Impaired venous drainage and chronic hypertension

Combination of vascular ischemia, neuropathy, and secondary infection

Hemosiderin deposition may accompany injury

Necrosis and failed healing occur in feet/lower extremities

Mechanisms may coexist clinically; the Robbins categories are instructive, not mutually exclusive.

The description does not establish diagnostic criteria or a fixed location for every lesion.

Slide 36 · A pressure sore is another distinct chronic wound

Venous leg ulcer

Pressure sore

Pressure within a congested venous system

External compression of tissue against bone

Impaired venous drainage and tissue oxygen delivery

Local ischemia from sustained mechanical pressure

Varicose veins may be causal

Limited mobility and prolonged compression are typical settings

Slide 37 · Chronic wound mechanisms at a glance

Wound type

Dominant injury mechanism

Robbins-associated context

Venous

Venous hypertension; poor drainage

Severe varicosities; CHF

Arterial

Atherosclerotic ischemia

Peripheral arterial disease; diabetes

Diabetic

Ischemia + neuropathy + infection

Lower limb, particularly foot

Pressure

Sustained tissue compression

Immobility against bony prominence

Slide 38 · Infection is a downstream complication

Chronic venous ulcers often have impaired healing.

Superimposed infections are recognized complications.

An infected nonhealing wound represents an added problem beyond venous dilation.

Slide 39 · From varicosity to chronic ulcer: Integrated chain

Pressure elevation and wall dilation cause valve incompetence.

Stasis and congestion generate edema and tissue ischemia.

Dermatitis, pigmentation, ulceration, and poor healing are downstream outcomes.

Pressure / dilation

Valve failure

Stasis / congestion

Skin ischemia

Chronic ulcer

Slide 40 · Case: Lower-leg pigmentation with an ulcer

Hypothetical teaching case

An older adult with longstanding varicose veins has dependent edema, brown skin discoloration, and a persistent lower-leg ulcer.

Reasoning prompts

What causes the brown discoloration?

Why may the ulcer fail to heal?

Which complications should be considered?

Slide 41 · Case reasoning: Interpret each finding

Hypothetical teaching case

The same hypothetical patient has varicose veins, edema, brown pigmentation, and a poorly healing skin defect.

Mechanistic interpretation

Edema: Congestion from impaired drainage.

Brown pigment: RBC breakdown with hemosiderin.

Ulcer: Chronic ischemic tissue injury.

Persistence/infection: Impaired repair, secondary infection.

Slide 42 · Varicosities also occur outside the leg

The Robbins section discusses esophageal varices and hemorrhoids.

Shared concept: Venous dilatation under prolonged abnormal pressure.

Different circulatory beds create different clinical dangers.

Lower limb

Valve failure, edema, dermatitis, ulcers

Gastroesophageal

Portal collaterals; Risk of major bleeding

Anorectal

Dilated plexus; Bleeding, thrombosis, pain

Slide 43 · Portal hypertension recruits alternative venous routes

Cirrhosis is a major cause of portal hypertension.

Elevated portal pressure promotes opening of portosystemic shunts.

Collateral veins enlarge in characteristic anatomical regions.

Portal hypertension

Portosystemic shunts

Collateral dilation

Slide 44 · Causes leading to esophageal varices

Cause described in Robbins

Mechanistic relation

Liver cirrhosis

Common cause of portal hypertension

Portal-vein obstruction

Less frequent route to portal hypertension

Hepatic-vein thrombosis

Less frequent route to portal hypertension

Slide 45 · Three sites reflect portosystemic collateralization

Gastroesophageal junction: Esophageal varices.

Rectal venous drainage: Anorectal collaterals.

Periumbilical abdominal-wall veins: Caput medusae.

Portal hypertension

Esophageal

Rectal

Periumbilical

Slide 46 · Esophageal varices are portal-systemic collaterals

Portal hypertension increases venous flow through gastroesophageal connections.

The enlarged veins are situated at the gastroesophageal junction.

These differ in cause and danger from primary superficial leg varicosities.

Portal venous system

Pressure raised by cirrhosis or obstruction

Gastroesophageal junction

Collateral veins become variceal

Slide 47 · Rupture makes esophageal varices high-risk

Variceal rupture can release blood into the upper gastrointestinal tract.

The resulting hemorrhage may be massive and fatal.

This hemorrhagic hazard drives the special importance of esophageal varices.

Portal pressure ↑

Esophageal varices

Rupture

Major upper-GI bleed

Slide 48 · Caput medusae is a visible collateral pattern

Portal hypertension may open periumbilical abdominal-wall collateral veins.

The visible dilated venous network is called caput medusae.

It indicates a different hemodynamic territory from lower-limb superficial varicosities.

Slide 49 · Rectal collateral vessels in portal hypertension

Portal hypertension may increase flow through venous shunts at the rectum.

Robbins groups this region among characteristic portosystemic collateral sites.

The separate possibility of primary hemorrhoidal plexus dilation must also be understood.

Portal hypertension

Rectal shunting

Venous plexus dilation

Slide 50 · Hemorrhoids may arise from primary plexus dilation

The anorectal junction contains a venous plexus.

Primary varicose dilation can produce hemorrhoids.

This may develop with prolonged pelvic venous congestion.

Anorectal venous plexus

Local vessel dilation with venous congestion

Hemorrhoid

Potential local bleeding, thrombus, and ulceration

Slide 51 · Pelvic pressure loading favors hemorrhoids

Pregnancy is associated with prolonged pelvic venous congestion.

Straining to defecate is another recognized precipitating circumstance.

Both provide examples of pressure-related anorectal venous dilation.

Slide 52 · Hemorrhoid complications are predominantly local

Pathologic event

Clinical manifestation

Surface / venous injury

Bleeding

Thrombosis of dilated plexus

Painful thrombotic event

Ulceration

Potentially painful surface defect

Slide 53 · Rectal bleeding should not be attributed automatically

Chapter 17 notes that hemorrhoids may cause bright-red rectal bleeding.

It also emphasizes that colon cancer can coexist and must be excluded.

Visible hemorrhoids do not conclusively explain all episodes of anorectal bleeding.

Slide 54 · Varicosities: Mechanism and danger depend on site

Anatomic site

Driver

Dominant Robbins complication

Superficial leg

Dependent pressure; valve failure

Stasis dermatitis / venous ulcer

Esophagus

Portal pressure and shunts

Potentially fatal GI hemorrhage

Anorectal plexus

Pelvic congestion or portal pathways

Bleeding; thrombosis; painful ulceration

Slide 55 · Case: Cirrhosis and upper-GI hemorrhage

Hypothetical teaching case

A patient with cirrhosis develops portal hypertension and then presents with severe upper gastrointestinal bleeding.

Reasoning prompts

Which variceal site is most concerning?

What vascular connection becomes enlarged?

Why is this unlike a typical leg varicosity?

Slide 56 · Case: Pregnancy and anorectal symptoms

Hypothetical teaching case

During pregnancy, a patient develops uncomfortable anorectal swelling with episodic bleeding during defecation.

Reasoning prompts

Which venous plexus can be involved?

What pressure-related factors are present?

Why should bleeding not be assumed benign?

Slide 57 · Mechanism check: Predict the next consequence

Dilated superficial vein + failed valve closure → predict the hemodynamic change.

Chronic congestion + red-cell extravasation → predict the pigment and skin appearance.

Cirrhosis + portal shunting + gastroesophageal dilation → identify the feared event.

Slide 58 · The unifying idea is pressure—but effects diverge

Leg veins: Dilation and incompetence impair drainage and injure skin.

Portal collaterals: Dilation creates vulnerable veins that may rupture.

Anorectal plexus: Dilation may produce bleeding, thrombosis, and ulceration.

Venous pressure ↑

Venous dilation

Site-specific injury

Slide 59 · Core Robbins references

Robbins, Cotran & Kumar: Pathologic Basis of Disease, 11th edition (2026).

Chapter 11, Blood Vessels: “Varicose Veins,” p. 471.

Chapter 11: “Thrombophlebitis and Phlebothrombosis,” pp. 471–472.

Chapter 3, Inflammation and Repair: “Defects in Healing: Chronic Wounds,” pp. 98–99.

Chapter 17, The Gastrointestinal Tract: “Hemorrhoids,” p. 745.