Skin Changes in Varicose Veins

Pathophysiological Basis

Clinical Spectrum of Skin Changes

1. Telangiectasias and Reticular Veins (Early / C1–C2)

• Telangiectasias (thread veins, spider veins): tiny intradermal venules <1 mm diameter, appearing as blue, purple, or red linear/branching patterns near the skin surface
• Reticular veins: bluish subdermal dilated veins 1–2.9 mm diameter, often tortuous
• Corona phlebectatica (malleolar flare): a fan-shaped pattern of telangiectasia around the ankle/foot — an early marker of advanced venous disease

Varicose veins with gaiter-area skin changes — Bailey and Love's, Fig. 62.3

2. Oedema (C3)

• Increased volume of fluid in skin and soft tissues, beginning distally and progressing proximally
• Classic pitting oedema: firm digital pressure leaves an indentation
• The earliest finding is perimalleolar oedema ascending the leg; soft tissue tenderness is often elicited even over normal-appearing skin — Fitzpatrick's Dermatology

3. Stasis Dermatitis / Venous Eczema (C4a)

Advanced skin changes — Bailey and Love's, Fig. 62.6

• An erythematous dermatitis with scaling, pruritus, erosions, crusting, occasional vesicles and serous drainage
• Typically arises in the medial supramalleolar region where microangiopathy is most intense
• Can occur at any stage of chronic venous insufficiency; over time, lesions may lichenify
• In extreme cases progresses to blistering and weeping
• Up to 80% of patients with venous leg ulcers develop allergic contact dermatitis from topical therapies — coexisting sensitisation must be considered — Fitzpatrick's Dermatology

4. Haemosiderosis / Pigmentation (C4a)

Haemosiderosis — Bailey and Love's, Fig. 62.7

• A brownish discolouration of the skin, usually permanent
• Results from extravasation of red blood cells and subsequent haemoglobin breakdown to haemosiderin in the dermis
• Predominantly periankle but also seen adjacent to varicose veins and incompetent perforators — Bailey and Love's

5. Lipodermatosclerosis (C4b)

• Chronic inflammation and fibrosis of the skin and subcutaneous tissues, producing a tight, contracted, 'woody' leg
• The pliable subcutaneous fat is gradually replaced by fibrosis; the indurated plaque begins at the medial ankle and extends circumferentially around the distal lower leg
• As fibrosis tightens it may strangle the lower leg, causing the classical "inverted champagne bottle" appearance with brawny oedema above and below
• Occasionally presents acutely as bright red erythema and tenderness mimicking cellulitis — distinguished by the absence of systemic signs and failure to respond to antibiotics; septal panniculitis is seen histologically
• Can result in significant Achilles tendon contracture — a sign of severe disease — Fitzpatrick's Dermatology; Bailey and Love's

6. Atrophie Blanche (C4b)

Atrophie blanche — Fitzpatrick's Dermatology, Fig. 148-12

• Localised areas of atrophic, porcelain-white skin, often stellate in shape, surrounded by hyperpigmentation and telangiectasias
• Represents dermal fibrosis secondary to ischaemia; a marker of severe chronic venous disease
• May also occur in hypercoagulable states (antiphospholipid syndrome, inherited coagulopathies), livedoid vasculitis, or autoimmune diseases (scleroderma, SLE) — Fitzpatrick's

7. Venous Ulceration (C5–C6)

Venous ulceration — Fitzpatrick's Dermatology, Fig. 148-13

• Full-thickness skin loss, usually around the ankle ("gaiter area"), that fails to heal spontaneously
• Propagated by continuing venous hypertension, tissue ischaemia, and the cumulative changes of chronic venous disease
• Can become chronic varicose ulcers due to poor wound healing and superimposed infection
• ~20% of patients with chronic venous insufficiency eventually develop venous ulcers — Robbins; Harrison's

8. Acroangiodermatitis of Mali (Pseudo-Kaposi Sarcoma)

• Purple macules, nodules, or verrucous plaques on the dorsal feet and toes
• Seen in longstanding venous insufficiency; mimics Kaposi sarcoma both clinically and histologically
• Also described in AV malformations, dialysis shunts, paralysed limbs — Fitzpatrick's

CEAP Classification Summary

Key Points

• The skin changes of varicose veins are collectively grouped under chronic venous insufficiency (CVI)
• The medial ankle/gaiter area is the most commonly and severely affected site due to the highest microangiopathic burden
• Stasis dermatitis, haemosiderosis, lipodermatosclerosis, atrophie blanche, and venous ulceration are the major dermatological sequelae
• Skin changes correlate with disease severity and reflux burden, but not necessarily with subjective symptoms
• Graduated compression (30–40 mmHg) is the foundation of management for C3–C6 disease