Dermatoscopía y su relación con la histopatología en el diagnóstico de queratosis actínica facial.

Abstract

Background: Actinic keratosis was previously considered a precursor or premalignant lesion of squamous cell carcinoma. Currently some studies reveal that it really corresponds to an early stage of it. The goal standard is the biopsy with its respective histopathological study. However, dermoscopy has gained relevance as a diagnostic tool through the identification of characteristic dermatoscopic signs. Methodology: This was a descriptive, cross-sectional study, to evaluate the diagnostic correlation of lesions diagnosed with facial actinic keratosis, by comparing dermoscopy with gold standard, skin biopsy.The study took place at the dermatological clinica “Centro privado de piel Enrique Úraga Peña”, in the city of Guayaquil, during a period of 12 month, from January 1, 2017 to December 31, 2017. The sample consisted of 27 patients with a presumptive diagnosis of actinic keratosis.Results: Dermoscopy was positive for facial actinic keratosis in 70.4% (19/27) of the patients. Positive dermoscopy findings had 90% sensitivity, specificity of 85.71%, PPV of 94.73% and NPV of 75%. The most sensitive dermatoscopic sign was perifollicular linear wavy vessels (Sensibility 80%) while the most specific results were pseudoreticulum and follicular openings with halo (Specificity 100%).Conclusions: Dermoscopy is robustly associated with histopathology for the diagnosis of facial actinic keratosis