Association of Oral Lichen Planus and Thyroid Disease

Study Overview
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Brief Summary
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Thyroid disease is a common endocrine disorder. Oral lichen planus (OLP) is a chronic autoimmune disease that occurs on the oral mucosa in 1-2% of the general population.The purpose of this study was to determine whether there is an association between thyroid disease and oral planus lichen in the population of our patients. In the last few years, a couple of studies have been published in the world literature that have studied the possible association of these diagnoses in different populations. Most of the results showed a higher prevalence of thyroid disease in the population of lichen patients, compared with patients without lichen, although some results are contradictory. Some authors believe that the onset of OLP precedes thyroid dysfunction. In the population of Croatian patients with lichen, no research has been done to study the possible connection between these two diseases. The obtained results could help clarify whether there is a connection between these two diagnoses in the population of our lichen patients and enable earlier detection of patients with thyroid hypofunction.

Official Title
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Association of Oral Lichen Planus and Thyroid Disease

Conditions
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Oral Lichen Planus, Thyroid Diseases

Intervention / Treatment
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* Diagnostic Test: determination of thyroid hormones and antibodies


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: for test group: female patients of the Department of Oral Medicine School of Dental Medicine University of Zagreb with clinically and histopathologically confirmed oral lichen planus for control group: female patients of the Department of Oral Medicine School of Dental Medicine University of Zagreb, without oral lichen planus or other immune disorders; age matched to test group Exclusion Criteria: male patients; female patients with immune disorders; female patients which are not age-matched to test group

Ages Eligible for Study
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Minimum Age: 35 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Oral lichen planus<br>Female patients of the Department of Oral Medicine with oral lichen planus | Diagnostic Test: determination of thyroid hormones and antibodies<br>* TSH, fT3, fT4, anti-TPO and anti-Tg were determined from blood sample<br>|
| Control<br>Female patients of the Department of Oral Medicine without oral lichen planus or other immune disorders | Diagnostic Test: determination of thyroid hormones and antibodies<br>* TSH, fT3, fT4, anti-TPO and anti-Tg were determined from blood sample<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The prevalence of thyroid diseases in patients with oral lichen planus | to determine whether there is a higher prevalence of thyroid disease in patients with oral lichen | January 2020-April 2020 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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oral lichen planus, thyroid diseases