Recalcitrant chronic leg ulcer: An indication for patch testing for hydrocolloid dressing

Chronic leg ulcers are commonly encountered in dermatologists' daily practices. As modern wound dressings become more popular among clinical practitioners and caregivers, allergic contact dermatitis reactions to these dressings emerge. Previous reports have indicated that as much as 40% to 80% of patients with chronic leg ulcers had hypersensitivity to different topical treatment products.1,2 A patient's risk of contact sensitization can be overlooked secondary to failure of patient disclosure or oversight.

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