Lower extremity venous valve incompetence or obstruction producing edema, hyperpigmentation, varicosities, and venous stasis ulcers over the medial malleolus.
Also known as: CVI, chronic venous insufficiency, venous stasis, venous ulcer, varicose veins
Overview
Chronic dysfunction of the lower extremity venous system due to valvular incompetence, obstruction, or muscle pump failure, producing ambulatory venous hypertension. Manifestations range from telangiectasias and varicose veins to skin pigmentation, lipodermatosclerosis, and venous leg ulcers. Severity is graded by the CEAP classification (Clinical, Etiologic, Anatomic, Pathophysiologic).
Epidemiology
Affects ~25% of adults in the US to some degree; lower extremity varicose veins are present in ~20-30% of women and ~10-20% of men. Venous ulcers affect ~1% of the population and account for ~70% of all leg ulcers. Cost burden is substantial due to chronic care and recurrence.
Try two board-style Chronic Venous Insufficiency questions
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Question 1CardiovascularMedium
A 62-year-old woman presents with a 2-year history of progressive bilateral leg swelling, aching that worsens by evening, and itching of the medial ankles. She has a history of obesity and two prior pregnancies. Exam shows pitting edema, brownish hyperpigmentation around both medial malleoli, and a shallow ulcer over the left medial malleolus with irregular borders. Pedal pulses are intact and the ankle-brachial index is 1.05. Which of the following is the most likely diagnosis?
ADeep vein thrombosis
BLymphedema
CCellulitis
DChronic venous insufficiency
EPeripheral arterial disease
Reveal answer & full explanation
Correct answer: D — Chronic venous insufficiency
ADeep vein thrombosis
BLymphedema
CCellulitis
DChronic venous insufficiency✓
EPeripheral arterial disease
Why Chronic venous insufficiency is correct
Chronic venous insufficiency (CVI) is caused by incompetent venous valves leading to ambulatory venous hypertension
Hallmark findings include dependent edema that worsens through the day, hemosiderin deposition with brawny hyperpigmentation in the gaiter distribution, and venous stasis ulcers over the medial malleolus
A normal ABI (1.00-1.40 in the 2024 ACC/AHA multisociety PAD guideline) — this patient's ABI is 1.05 — and palpable pulses indicate adequate arterial inflow, supporting venous (not arterial) etiology
Why the others are wrong
Peripheral arterial disease — produces lateral or distal punched-out ulcers, typically with diminished pulses and an ABI of 0.90 or less, not this picture
Lymphedema — causes non-pitting, dorsal-foot edema with a positive Stemmer sign and does not produce hemosiderin staining or venous ulceration
Deep vein thrombosis — presents acutely with unilateral pain, warmth, and swelling rather than chronic, bilateral, evening-worse edema with skin changes
Cellulitis — itching, skin discoloration, and an ulcer are often misread as infection, but cellulitis is an acute, usually unilateral process with warmth, tenderness, and spreading erythema; 2 years of bilateral pitting edema with brownish hemosiderin staining is chronic venous stasis change, and true bilateral cellulitis is rare
Additional high-yield points
Initial diagnosis is clinical; duplex ultrasound confirms venous reflux
Management centers on compression therapy and leg elevation
Question 2CardiovascularMedium
A 54-year-old woman has chronic leg swelling, brown discoloration near the ankles, and aching that worsens with standing. Which of the following best explains her condition?
AChronic arterial occlusive disease
BElevated deep muscular compartment pressure
CVenous valvular incompetence with reflux
DLymphatic obstruction after infection
EHypoalbuminemia reducing oncotic pressure
Reveal answer & full explanation
Correct answer: C — Venous valvular incompetence with reflux
AChronic arterial occlusive disease
BElevated deep muscular compartment pressure
CVenous valvular incompetence with reflux✓
DLymphatic obstruction after infection
EHypoalbuminemia reducing oncotic pressure
Why Venous valvular incompetence with reflux is correct
Chronic venous insufficiency stems from incompetent venous valves and reflux, producing sustained ambulatory venous hypertension.
Stasis dermatitis and hemosiderin deposition cause the brown ankle discoloration.
Symptoms worsening with standing and easing with elevation are hallmark venous features.
Why the others are wrong
Chronic arterial occlusive disease — Arterial hypoperfusion causes claudication, hair loss, and pallor on elevation rather than dependent edema with hemosiderin staining that worsens on standing; this is an arterial-vs-venous trap.
Lymphatic obstruction after infection — Lymphedema produces nonpitting, non-hyperpigmented swelling that does not vary with standing; this is an edema-pattern trap.
Elevated deep muscular compartment pressure — Compartment syndrome is an acute, severely painful surgical emergency, not a chronic stasis picture; this is an acuity-mismatch trap.
Hypoalbuminemia reducing oncotic pressure — low plasma oncotic pressure does cause pitting edema, but it tends to be generalized (periorbital, sacral, or anasarca) and lacks the brown hemosiderin staining at the ankles that marks sustained venous hypertension; this is a Starling-force trap.
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Prior deep vein thrombosis (post-thrombotic syndrome): the dominant risk factor for severe CVI and venous ulceration in the affected limb, especially after extensive iliofemoral DVT; PTS follows roughly 20-50% of DVTs
Pregnancy (mechanical compression and hormonal changes)
Sedentary lifestyle, immobility
Smoking
Pelvic mass or pelvic congestion syndrome
Pathophysiology
Failure of one-way venous valves in the superficial, perforating, or deep venous system allows retrograde blood flow (reflux) on standing or with calf muscle contraction. The resulting sustained ambulatory venous hypertension causes capillary leak of fluid, plasma proteins, and red blood cells into the dermis. Hemosiderin deposition produces characteristic brown pigmentation; chronic inflammation drives lipodermatosclerosis (fibrotic, woody induration). Skin breakdown produces venous ulcers, classically over the medial malleolus (gaiter area).
Clinical presentation
Symptoms
Lower extremity heaviness, aching, throbbing, or cramping — worse with prolonged standing, improved with elevation
Itching, burning, restless legs
Visible varicose veins or telangiectasias
Recurrent skin breakdown / ulceration, usually over the medial malleolus
Often bilateral but often asymmetric
Signs / physical exam
Pitting edema, worse at end of day, improving overnight
Hemosiderin deposition: brown pigmentation in the gaiter distribution (medial ankle and lower calf)
Lipodermatosclerosis: woody, fibrotic 'inverted champagne bottle' deformity of the lower calf
Atrophie blanche: porcelain-white atrophic patches with surrounding telangiectasias
Venous ulcers: shallow, irregular, exudative, granulating base, located over the medial malleolus
Pulses are typically preserved unless concurrent arterial disease
Varicose veins: dilated tortuous superficial veins, often along the great or small saphenous distribution
Classic findings
Shallow, exudative ulcer over the medial malleolus with surrounding brown pigmentation and lipodermatosclerosis — venous stasis ulcer.
Differential diagnosis
Arterial insufficiency (PAD) — Cool, pale extremity; absent or diminished pulses; ABI <0.9; ulcers over pressure points (toes, lateral malleolus), punched-out and painful; intermittent claudication
Lymphedema — Painless, firm, non-pitting in chronic stages; toes and dorsum of foot involved (positive Stemmer sign); minimal skin changes early; lymphoscintigraphy if confirmation needed
Cellulitis — Acute erythema, warmth, fever, leukocytosis — often misdiagnosed as venous insufficiency and vice versa; bilateral 'cellulitis' should prompt reconsideration
Stasis dermatitis — Pruritic, scaly, erythematous patches in the same gaiter distribution; can mimic cellulitis; often coexists with CVI
Diagnostic workup
Diagnostic criteria
CEAP classification: C0 (no visible signs) → C1 (telangiectasias) → C2 (varicose veins) → C3 (edema) → C4a (pigmentation/eczema) → C4b (lipodermatosclerosis/atrophie blanche) → C5 (healed ulcer) → C6 (active ulcer). The classification also includes etiology, anatomic site, and pathophysiologic mechanism.
Labs
Basic labs typically normal; targeted testing for differential considerations (BNP, albumin, urinalysis)
Wound cultures if signs of infection
Imaging
Venous duplex ultrasonography — first-line diagnostic test; assesses for reflux (>500 ms reversal in superficial / >1000 ms in deep veins) and obstruction
Ankle-brachial index (ABI) — essential before compression therapy or ulcer care; ABI <0.5 contraindicates standard compression, ABI 0.5-0.8 requires modified (light) compression
Photoplethysmography or air plethysmography for selected cases
MR or CT venography if iliocaval obstruction or pelvic congestion suspected
Diagnostic algorithm
Feature
Venous Ulcer
Arterial Ulcer
Location
Medial malleolus (gaiter area)
Lateral malleolus, toes, pressure points
Appearance
Shallow, irregular border, exudative, granulating base
Punched-out, deep, dry, pale or necrotic base
Pain
Mild-moderate, improved with elevation
Severe, worse with elevation; better when dependent
Surrounding skin
Hyperpigmentation, lipodermatosclerosis, eczema
Pale, cool, hairless, shiny atrophic skin
Pulses
Preserved (unless concurrent PAD)
Diminished or absent
ABI
Usually >0.9
<0.9, often <0.5
First-line therapy
Compression + wound care
Revascularization (endovascular or surgical)
Distinguishing venous from arterial leg ulcers — a high-yield bedside comparison.
Treatment
First-line
Compression therapy is the cornerstone of conservative care (edema, skin changes, ulcers, and patients who are not candidates for or decline intervention) — graduated compression stockings (knee-high, 20-30 mmHg for mild-moderate disease; 30-40 mmHg for severe disease and ulcer prevention); ensure ABI ≥0.8 before strong compression
Multicomponent compression bandaging (e.g., four-layer bandage) or an inelastic Unna boot (zinc oxide paste) for active ulcers — heals ~70% of venous ulcers within 6 months; adding early endovenous ablation of superficial reflux speeds healing (EVRA), and correcting superficial reflux reduces recurrence (ESCHAR)
Leg elevation above heart level for 30 minutes 3-4 times daily
Exercise to engage calf muscle pump (walking, ankle pumps)
Endovenous thermal ablation (radiofrequency or laser ablation) of the great or small saphenous vein for symptomatic reflux — recommended over long-term compression stockings in patients who are candidates for intervention, without a mandatory compression trial first (SVS/AVF/AVLS 2022-2023); superior to traditional surgical stripping (less pain, faster recovery, equivalent efficacy)
Foam or liquid sclerotherapy for residual or telangiectatic veins
Ambulatory phlebectomy (microincisional removal) for bulging varicosities
Iliac vein stenting for post-thrombotic obstruction or May-Thurner anatomy
Surgical ligation and stripping reserved for selected cases when endovenous approach is not feasible
Pentoxifylline or micronized purified flavonoid fraction (MPFF) as adjunct for refractory ulcers
Aspirin has limited evidence for ulcer healing acceleration
Complications
Recurrent venous ulceration and chronic wound care burden
Cellulitis from skin breakdown
Superficial venous thrombosis (often in tortuous varicosities)
Bleeding from ruptured varicose veins (can be substantial; treat with elevation, pressure, and definitive vein closure)
Lipodermatosclerosis with permanent skin and subcutaneous changes
Marjolin ulcer: rare squamous cell carcinoma in chronic venous ulcers (consider biopsy of non-healing ulcers)
PANCE pearls
Always check ABI before initiating compression therapy — strong compression on an ischemic limb can cause tissue necrosis.
Venous ulcers occur over the MEDIAL malleolus and are shallow, exudative, and painless to mildly painful. Arterial ulcers occur over the LATERAL malleolus and pressure points, are punched-out and painful.
Topical antibiotics are NOT routinely used for venous ulcers — they delay healing and cause sensitization. Wound care + compression is the foundation.
Endovenous ablation has replaced stripping as the gold standard for saphenous reflux due to lower morbidity and equivalent or superior outcomes.
Routine compression stockings after acute DVT are not recommended to prevent post-thrombotic syndrome: the placebo-controlled SOX trial showed no benefit and CHEST suggests against routine use, although trial evidence remains mixed; encourage early ambulation and use compression to relieve symptoms of acute DVT or established PTS.
References
SVS/AVF/AVLS 2022-2023 — The 2022 Society for Vascular Surgery, American Venous Forum, and American Vein and Lymphatic Society clinical practice guidelines for the management of varicose veins of the lower extremities, Part I (Gloviczki et al., J Vasc Surg Venous Lymphat Disord 2023), and the 2023 SVS/AVF/AVLS clinical practice guidelines, Part II (Gloviczki et al., J Vasc Surg Venous Lymphat Disord 2024)
ESVS 2022 — European Society for Vascular Surgery (ESVS) 2022 Clinical Practice Guidelines on the Management of Chronic Venous Disease
ESCHAR Trial — Comparison of surgery and compression with compression alone in chronic venous ulceration (ESCHAR study): randomised controlled trial (Barwell et al., Lancet 2004)
EVRA Trial — A Randomized Trial of Early Endovenous Ablation in Venous Ulceration (Gohel et al., NEJM 2018)
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