Patch test results from 163 patients with leg ulcers and/or chronic venous insufficiency, tested with a modified ICDRG standard test battery and a pharmaceutical test series, are analyzed and compared with the results obtained from a randomly selected control group of patients with eczematous conditions. A sensitization index for the most common contact allergens present in this test series is calculated, and the relevancy of hypersensitivity to specific topical agents is determined.