Potassium dichromate sensitivity presenting as tefillin dermatitis: A retrospective cohort study

Area of Science:

• Dermatology
• Allergology
• Occupational Health

Background:

• Tefillin dermatitis is a known reaction to potassium dichromate in leather.
• However, data on its prevalence and clinical features are limited.

Purpose of the Study:

• To determine the prevalence and clinical characteristics of tefillin dermatitis.
• To assess the outcomes of switching to chromate-free tefillin.

Main Methods:

• Retrospective review of male patients patch tested between 2009-2023.
• Analysis of clinical data for those diagnosed with tefillin dermatitis.

Main Results:

• 25 out of 1679 patients (1.49%) were diagnosed with tefillin dermatitis.
• The condition accounted for 15.34% of all potassium-dichromate-positive patients.
• 56% switched to chromate-free tefillin, with 79% experiencing complete symptom resolution.

Conclusions:

• Tefillin dermatitis may be more common than previously recognized.
• Switching to chromate-free tefillin offers a favorable prognosis.
• This study provides the largest dataset on tefillin dermatitis due to potassium dichromate sensitivity.