{'fraction_non_alphanumeric': 0.04562383612662942, 'fraction_numerical': 0.03445065176908752, 'mean_word_length': 5.286549707602339, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A 10‐Year Retrospective Study on Palladium Sensitivity

Background: Palladium has become an important contact allergen because of increased use in industry, jewelry, and dentistry. Objective: To determine the frequency of palladium allergy in a US patch‐test population tested to palladium. Methods: A 10‐year retrospective review (1997–2006) was performed on patients sensitive to palladium at the Department of Dermatology, Mayo Clinic, Rochester, MN. Results: A total of 910 patients were tested to a series that included palladium chloride 2% in petrolatum. A palladium‐positive patch‐test result was noted in 110 patients (12.1%). Of the 106 patients sensitized to palladium who had records available for review, 15.1% had a diagnosis of lichen planus‐like eruptions; 13.2%, burning mouth; 27.4%, stomatitis; and 29.2%, hand and body dermatitis. Conclusion: Palladium sensitivity is more common in oral diseases than in skin. We describe a previously unknown high degree of co‐reactivity of gold with palladium to the same degree as the known co‐reactivity with nickel.