Inmunohistochemical detection of mastocytes in tissue from patients with actinic prurigo
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Eduwiges Martínez-Luna [1] ; Ronell Bologna-Molina [2] ; Adalberto Mosqueda-Taylor [3] ; Juan-Carlos Cuevas-González [2] ; Erika Rodríguez-Lobato [1] ; María-Abril Martínez-Velasco [1] ; María-Elisa Vega-Memíje [1]
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[1] Hospital General Dr. Manuel Gea Gonzalez
Hospital General Dr. Manuel Gea Gonzalez
México
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[2] Universidad Juárez del Estado de Durango
Universidad Juárez del Estado de Durango
México
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[3] Universidad Autónoma Metropolitana
Universidad Autónoma Metropolitana
México
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- Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 7, Nº. 5 (diciembre), 2015, págs. 656-659
- Idioma: inglés
- Enlaces
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Resumen
Background: Actinic prurigo (AP) is a type of photodermatosis, the pathophysiology of which has not been determined. AP has been suggested to be a hypersensitivity reaction to the presence of eosinophils and the local production of IgE.
Material and Methods: Descriptive study, using paraffin blocks of tissue that have been diagnosed with AP from the Dermopathology department, Hospital General Dr. Manuel Gea González. In 66 blocks from 63 patients, eosinophils were identified by hematoxylin and eosin staining, and mastocytes were labeled by immunohistochemistry.
Three random microphotographs (40x) were used, and cell counts were calculated as the mean count in the 3 microphotographs.
Results: Forty cases (63.5%) were female, and 23 (36.5%) were male. The mean age was 26.49 ±14.09 years;
regarding the evolution time of the disease, the average was 11.93 years ±11.39. In 38 of 63 cases (60%), the lip, skin, and conjunctiva were affected clinically. In 22 of 63 cases (34%), AP cheilitis was the sole manifestation, and in 4 of 63 cases (6%), there were lesions in the skin and conjunctiva. The mean eosinophil count was 9 per case, the average number of mastocytes/field was 28.48 (range 0 to 66) Kruskal-W allis p =0.001.
Conclusions: There are elements in AP that mediate the reaction of hypersensitivity type IV b, necessitating the identification of triggering factors.
