Cellulitis vs Stasis dermatitis
How to tell Cellulitis and Stasis dermatitis apart when a board question makes them look alike.
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Bilateral chronic hyperpigmented pruritic edema favors stasis dermatitis, while acute unilateral tenderness favors cellulitis.
Side by side
Unilateral warm erythematous tender skin with fever and leukocytosis supports cellulitis.
Chronic bilateral lower-leg erythema with scaling, pruritus, edema, and brown hemosiderin pigmentation supports stasis dermatitis.
Bacterial invasion of dermis and subcutaneous tissue causes acute inflammatory infection, usually from streptococci or staphylococci.
Chronic venous hypertension causes capillary leakage, inflammation, and eczematous skin change without primary infection.
CBC often shows leukocytosis above 12000 per uL, CRP may rise above 10 mg/L, and exam is usually unilateral with advancing tenderness and warmth.
Stasis dermatitis commonly has normal WBC count, bilateral pitting edema, hyperpigmented gaiter-area skin, and duplex ultrasound may show venous insufficiency.
The trap
Bilateral red legs are frequently treated as bilateral cellulitis, leading to unnecessary IV antibiotics. The resolving clue is chronic venous skin change with itch and lack of systemic infection signs.
The repair move
Next best step: treat venous stasis dermatitis with compression therapy, leg elevation, emollients, and medium-potency topical corticosteroid for inflamed plaques. Reserve systemic antibiotics for cases with clear unilateral infection, fever, and progressive tenderness.
Try a free question
CoreA 70-year-old man has chronic bilateral ankle edema and itchy erythematous scaling patches on both shins. BP 150/88 mm Hg, HR 80/min, temp 36.7 C, and WBC is 8300 per uL. What is the next best step in management?
Show answer and explanation
Answer: B. Compression therapy with topical corticosteroid. Clinical features are most consistent with stasis dermatitis, which is treated with venous support and topical anti-inflammatory therapy.
Why the other choices are tempting
- A. IV antibiotics are not indicated without evidence of acute bacterial infection.
- C. Debridement is unnecessary without necrosis or severe soft tissue infection.
- D. Acyclovir does not treat venous stasis dermatitis.
- E. Untreated stasis dermatitis can worsen skin breakdown and ulcer risk.
Flashcards
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What pattern of laterality helps distinguish stasis dermatitis from cellulitis?
Stasis dermatitis is typically bilateral, while cellulitis is usually unilateral.
Which skin finding points toward venous stasis rather than bacterial cellulitis?
Chronic brown hemosiderin pigmentation with scaling and pruritus suggests stasis dermatitis.
Quick answers
What is the fastest way to tell Cellulitis from Stasis dermatitis?
Bilateral chronic hyperpigmented pruritic edema favors stasis dermatitis, while acute unilateral tenderness favors cellulitis.
What is the key clue for Cellulitis?
Unilateral warm erythematous tender skin with fever and leukocytosis supports cellulitis.
What is the key clue for Stasis dermatitis?
Chronic bilateral lower-leg erythema with scaling, pruritus, edema, and brown hemosiderin pigmentation supports stasis dermatitis.
What is the common trap with Cellulitis vs Stasis dermatitis?
Bilateral red legs are frequently treated as bilateral cellulitis, leading to unnecessary IV antibiotics. The resolving clue is chronic venous skin change with itch and lack of systemic infection signs.