A venous ulcer initially improves with compression but develops sharply demarcated pruritic eczema beneath the cohesive bandage and around the

Question

A venous ulcer initially improves with compression but develops sharply demarcated pruritic eczema beneath the cohesive bandage and around the adhesive border. Infection markers are normal. Which investigation best identifies the remediable cause?

Accepted Answer

Patch testing using the patient’s dressings plus rubber and colophonium allergens

Answer

Venous duplex ultrasonography to assess whether venous reflux explains the eruption

Answer

Bacterial swab of intact eczematous skin before every dressing change

Answer

Punch biopsy to quantify venous inflammation before changing the bandage

Answer

Serum total IgE and food-specific IgE panel without exposure-directed testing

Compression Adherence — SCE Dermatology MCQ

A venous ulcer initially improves with compression but develops sharply demarcated pruritic eczema beneath the cohesive bandage and around the adhesive border. Infection markers are normal. Which investigation best identifies the remediable cause?