Dermatoscopy aids in the diagnosis of the solitary red scaly patch or plaque–features distinguishing superficial basal cell carcinoma, intraepidermal carcinoma, and psoriasis - 24/04/13
Abstract |
Background |
Intraepidermal carcinoma (IEC), superficial basal cell carcinoma (sBCC), and psoriasis are common entities that may all present as well-defined, brightly erythematous plaques. Currently, there are limited data on the dermatoscopic features that differentiate these diagnoses.
Objective |
We sought to describe the most significant morphologic findings seen on dermatoscopy of IEC, sBCC, and psoriasis, and formulate a diagnostic model based on these features.
Method |
We conducted a retrospective observational study using macrophotography and dermatoscopy to evaluate the presence or absence of dermatoscopic features and formulated diagnostic models for each diagnosis. A convenient sample of 300 lesions was collected from 255 patients from two hospital dermatology clinics and 4 private dermatology practices. These comprised 150 cases of sBCC, 100 cases of psoriasis, and 50 cases of IEC.
Results |
The most significant dermatoscopic features of IEC were a clustered vascular pattern, glomerular vessels, and hyperkeratosis. When all 3 features were observed together, the diagnostic probability for IEC was 98%. sBCCs were characterized by a scattered vascular pattern, arborizing microvessels, telangiectatic or atypical vessels, milky-pink background, and brown dots/globules; the diagnostic probability was 99% if 4 of these 6 features were identified. For psoriasis, the significant features identified were a homogenous vascular pattern, red dots, and light-red background, yielding a diagnostic probability of 99% if all 3 features were present.
Limitations |
Lack of evaluation of interobserver/intraobserver reproducibility is a limitation.
Conclusion |
Dermatoscopy is valuable in the diagnosis and differentiation of IEC, sBCC, and psoriasis because of consistent dermatoscopic morphology.
Le texte complet de cet article est disponible en PDF.Abbreviations used : BCC, IEC, sBCC
Plan
Funding sources: None. |
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Conflicts of interest: None declared. |
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Presented at the 39th Annual Scientific Meeting, Australasian College of Dermatologists, Melbourne, Victoria, May 14-17, 2006, and First Congress of the International Dermoscopy Society, Naples, Italy, April 27-29, 2006. |
Vol 59 - N° 2
P. 268-274 - août 2008 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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