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Allergic contact dermatitis prevalence in patients with otitis externa
P D Pigatto1, A Bigardi, A Legori
12nd Department of Dermatology, University of Milan, Italy.
Acta Dermato-Venereologica
|January 1, 1991
Summary
This study analyzed otitis externa in 64 patients, finding allergic contact dermatitis in 23.5%. Topical drugs and ear prosthesis materials were common allergens, highlighting the need for carefully selected patient groups in research.
Area of Science:
- Dermatology
- Otolaryngology
Background:
- Otitis externa is a common condition affecting the auditory canal.
- Allergic contact dermatitis is a potential cause of otitis externa.
Purpose of the Study:
- To statistically analyze the relationship between otitis externa and clinical/etiological variables.
- To determine the incidence of allergic contact dermatitis in otitis externa patients and identify common allergens.
Main Methods:
- A sequential series of 64 patients with otitis externa were analyzed.
- Patch testing was used to identify allergens in patients with suspected allergic contact dermatitis.
Main Results:
- True eczema of the auditory canal was observed in 43 patients.
- 23.5% of dermatitis patients had allergic contact dermatitis, with topical drugs and ear prosthesis materials being the most frequent sensitizers.
- Lower incidence of allergic contact dermatitis was noted compared to previous studies.
Conclusions:
- Topical drugs and ear prosthesis components are significant allergens in otitis externa.
- Accurately selected patient series are crucial for reliable studies on allergic contact dermatitis due to its relatively low incidence in this population.