Hallazgos dermatoscópicos en queratosis liquenoide y su relación con las variantes clínicas en pacientes con diagnóstico confirmado por histopatología en el Centro Dermatológico “Dr. Úraga” durante el periodo 2019-2021.

Abstract

Background: Lichenoid keratosis is considered a disorder of benign origin, apparently the product of the regression of other lesions such as seborrheic keratosis or solar lentigo. Its clinical and dermatoscopic manifestations are varied, so its diagnosis is a real challenge as it simulates various pathologies, mainly of malignant origin, which would probably contribute to making it a little suspected entity when requesting a biopsy. Its main purpose lies in the socialization of the different variants and associated dermatoscopic findings, allowing the dermatologist to take it into account with greater frequency and precision. Materials and Methods: A retrospective, correlational study was carried out between the clinical variants of keratosis lichenoides and the dermatoscopic findings of 30 patients diagnosed with keratosis lichenoidesconfirmed by histopathology at the Dermatologic Center “Dr. Úraga”. The variables studied were: clinical variants, dermatoscopic findings, age, sex, anatomical location, photodamage, skin phototype according to Fitzpatrick and presumptive diagnoses prior to biopsy. Results: Lichenoid keratosis occurred more in female patients with a history of photodamage, between 57 - 74 years old, surprisingly more cases were observed in Fitzpatrick phototype III; the mostreported clinical variant was the plaque type and the most common finding was scales; an association between scar-type depigmentation and flat pigmented, papulokeratotic and morpheiform variants was demonstrated; as well as the association between generalized peppering and the clinical plaque variant. The suspicion of lichenoid keratosis ranked 8th out of 13 diagnostic presumptions. Conclusions: Dermoscopy allows us to identify findings that can serve as a guideline to broaden our diagnostic ideas and make therapeutic decisions. It is necessary to collect information through larger and prospective studies regardingthis problem, in order to spread them and make them part of our daily training.