Late onset atopic dermatitis and vitiligo: A case report

Journal Title: Cumhuriyet Medical Journal - Year 2017, Vol 39, Issue 2

Abstract

Dear Editor, Adult-onset atopic dermatitis (AOAD) (onset >18 years) is a subgroup of atopic dermatitis (AD). This subgroup has been mentioned by Bannister and Freeman from Australia1. It may have different morphologic variants. Apart from the most typical flexural localization and eczematous pattern in adults, patients may also have a nonflexural distribution and other morphologic variants such as nummular or prurigo-like pattern2. The Hannifin and Rajka criteria can be used to diagnose AOAD3. AD is occasionally associated with vitiligo, and patients with vitiligo, especially early onset may appear to have increased risk of AD4. We present a rare case with late onset atopic dermatitis and vitiligo. A 16 year old boy suffering from itchy lesions and dryness on his whole body, especially on flexural distributions for 6 months admitted to our out-patient policlinic. He also complained depigmented lesions. No personal history of atopy. His mother has an allergic rhinitis for many years. Dermatologic examination of the patient revealed pruritic dry skin, pilar keratosis, and symmetric lichenified flexural eczema. He has a facial erythema, orbital darkness and Dennie-Morgan folds (Figure 1). Potassium hydroxide preperations were negative. Histopathologic examination of the lesions showed the findings of chronic dermatitis. The diagnosis of atopic dermatitis was made based on Hanifin-Rajka criteria. He has also symmetric depigmented lesions on the popliteal skin area. Wood lamp examination of these lesions revealed blue-white light areas with sharp margins. Haematologic and urine analysis, including IgE, ANA and antithyroid antibodies were in normal range. Atopic dermatitis is a chronic or chronic relapsing, the classic morphology and location of which differs depending on age, and which is usually associated with severe pruritus. AD is a common skin disease, both in childhood and adolescence and in adults5. The term AOAD (onset >18 years) was introduced by Bannister and Freeman1. The onset age of the disease in our case was 16. Because of that, our case is not an AOAD. However, his diagnosis may be accepted as a late-onset atopic dermatitis. There is lack of diagnostic criteria useful in both children and adults. Therefore understanding the natural history of AD is complicated. The UK working party criteria may not perform well among adults6. Ozkaya1 reported that there is no problem in detecting early-onset AD according to The UK working criteria, but approximately one fourth of patients could not be given the diagnosis of AOAD according to this in its current form. The criteria of Hanifin and Rajka have been considered as a gold standard for AD diagnosis for the last 20 years, and this criteria was used in the diagnosis of our case. A diagnostic difficulty may arise when the onset occurs after the adolescence or later, as in these cases the clinical pattern may be atypical. However it may still present with flexural dermatitis3. Our case had a typical typical flexural distribution and lichenified eczematous pattern. AD may be associated with specific subsets of vitiligo, and may indicate poor prognostic value for vitiligo. The mechanisms of association between AD and vitiligo are yet unknown. Patients with vitiligo, especially early onset, appear to have increased risk of AD4. The onset time was almost the same for both diseases in our case. However, while our case has a late onset time for AD, but early onset for vitiligo. Further studies are needed to explain the association between atopic dermatitis and vitiligo, and common disease mechanisms for both diseases.

Authors and Affiliations

Sibel Berksoy Hayta, Rukiye Güner, Melih Akyol

Keywords

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  • EP ID EP238833
  • DOI 10.7197/223.v39i29491.316373
  • Views 94
  • Downloads 0

How To Cite

Sibel Berksoy Hayta, Rukiye Güner, Melih Akyol (2017). Late onset atopic dermatitis and vitiligo: A case report. Cumhuriyet Medical Journal, 39(2), 507-508. https://europub.co.uk/articles/-A-238833