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Journal of the American Academy of Dermatology
Volume 58, n° 3
pages 407-414 (mars 2008)
Doi : 10.1016/j.jaad.2007.12.002
Clinical differences between atopic and atopiform dermatitis
 

Elian E.A. Brenninkmeijer, MD a, , Phyllis I. Spuls, MD, PhD a, b, Catharina M. Legierse, MD a, Robert Lindeboom, PhD c, J. Henk Sillevis Smitt, MD, PhD a, Jan D. Bos, MD, PhD, FRCP a,
a Department of Dermatology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands 
b Dutch Cochrane Centre, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands 
c Department of Clinical Epidemiological, Biostatistics and Bioinformatics, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands 

Reprint requests: Jan D. Bos, MD, PhD, FRCP, Department of Dermatology, Academic Medical Center, University of Amsterdam, The Netherlands.Correspondence to: Elian E. A. Brenninkmeijer, MD, Department of Dermatology, Academic Medical Center, University of Amsterdam, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands.
Abstract
Background

Atopic dermatitis (AD) has been divided into the “extrinsic” and “intrinsic” type, in which “intrinsic AD” is characterized by the absence of allergen-specific IgE. Still, there is no consensus whether this “intrinsic type” of AD, which we denominate as atopiform dermatitis (AFD), is a distinct entity.

Objective

A case-control study was performed to compare the clinical and diagnostic features of AD and AFD.

Methods

Patients with a clinical diagnosis of AD were selected. Cases did not have demonstrable allergen-specific IgE. Matched control subjects were tested positive for allergen-specific IgE. Patients were evaluated for medical history, quality of life, disease severity, and Hanifin and Rajka, U.K. and Millennium diagnostic criteria.

Results

Eight percent (n = 34) of the selected patients had, in fact, AFD. Female predominance, absence of atopic diseases, later onset of disease, and milder disease severity were observed in AFD. A history of atopy, recurrent conjunctivitis, palmar hyperlinearity, keratosis pilaris, pityriasis alba, and hand and/or food eczema were significantly less present in AFD. Dennie-Morgan fold was positively associated with AFD.

Limitations

Not all patients with negative allergen-specific IgE participated and a relatively small number of AFD patients were studied.

Conclusions

In addition to the absence of allergen-specific IgE, our findings support that AFD is an entity distinct from AD. With a distinction shown between AFD and AD, patient groups will be better defined and more homogeneous. Implications of this distinction will be of importance for preventive and therapeutic advice; diagnostic processes; and for future research.

The full text of this article is available in PDF format.

Abbreviations used : AD, AFD, AMC, EASI, IGA, IQR, QoL, SCORAD, SPT



 Funding sources: None.
 Conflicts of interest: None declared.



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