Eczema in Psoriatico: An Important Differential Diagnosis Between Chronic Allergic Contact Dermatitis and Psoriasis in Palmoplantar Localization. | LitMetric
Differential diagnosis of palmoplantar non-pustular psoriasis and chronic allergic contact dermatitis (ACD) and the combination of these conditions, termed "eczema in psoriatico" (EIP), is difficult, especially in cases of isolated involvement. A blind re-evaluation of 63 archived formalin-fixed palmoplantar samples, previously diagnosed clinically as either psoriasis or chronic ACD, was performed. Samples were allocated to histopathological diagnoses of psoriasis, contact dermatitis or EIP. Immunohistological stainings were performed for better characterization. Immunochemistry of EIP revealed features that overlapped contemporarily with psoriasis (cytokeratin 17 (CK17), Ki67, interleukin (IL)-8, IL-17, IL-23) and with ACD (CD1a, major histocompatibility complex (MHC) class I, MHC class II, epidermal T-cell subsets). Surprisingly, a significantly much higher number of dermal CD8+ T cells was found in EIP than in ACD and psoriasis. In conclusion, this study provides insight into the immunohistological differentiation of palmoplantar psoriasis, chronic ACD and EIP.
Background: The European Photopatch Testing Baseline Series (EPTBS) was published in 2013. However, limited data exist regarding the real-world clinical application of the EPTBS.
Objectives: This study aims to describe the photopatch test experience with the EPTBS over 11 years at a tertiary hospital in Spain.
Patch testing reactions can be difficult to interpret in patients with skin of color (higher Fitzpatrick skin types [FSTs]) due to limited erythema or vesiculation. Missed reactions may lead to prolonged allergic contact dermatitis duration and prevent disease clearance in this population. To compare the frequency of borderline patch test reactions in patients with different FSTs (I, II, III, IV, V, VI).
Panthenol, a vitamin B5 derivative, is a key precursor in the synthesis of fatty acids that maintain epithelial function. Its ability to aid in moisturization, skin barrier restoration, and wound healing has led to its frequent incorporation into personal care products and pharmaceuticals-many of which are marketed to be hypoallergenic. While contact allergy to panthenol is rather uncommon, rates of positive reactions are on the rise, increasing from 0.
From the Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan.
Background/objectives: Eyelid allergic contact dermatitis (ACD) attributed to ophthalmic medications is often underreported, which can result in poor outcomes. Patch testing for eyelid ACD requires up-to-date knowledge of potential allergens. The aim of this study was to investigate allergens in ophthalmic medicaments in New Zealand.
