Segmental lichen aureus: an uncommon presentation

Abstract: Pigmented purpuric dermatoses are chronic vascular inflammatory conditions characterized by the presence of pigmented macules. Among its different presentations, lichen aureus is distinguished by the lichenoid conformation of its plaques and the predilection for lower limb involvement. Its segmented form is rare and difficult to control, especially in cases of symptomatic lesions. We report a rare case of segmental lichen aureus with six years of evolution associated with light itching. We also discuss the main therapeutic approaches to control the disease.

Queratosis liquenoide benigna / Benign lichenoid keratosis

La queratosis liquenoide benigna es una dermatosis relativamente frecuente, con presentación clínica en determinados ocasiones, que puede llegar o lo confusión con el melanoma. Se plantea que puede ser una lesión benigna en regresión. La dermatoscopia es de gran utilidad para lo orientación diagnóstica. El diagnóstico es histopatológico, por lo cual en los casos confusos lo realización de una biopsia está indicada. Se realizo uno revisión de lo literatura sobre la clínica, histopatología y dermatoscopia de lo queratosis liquenoide benigna.

Benign lichenoid keratosis is a relatively common dermatosis which clinical presentation in some cases causes confusion with melanoma. It is suggested that it may be a regressing benign lesion. Dermascopy is very useful for diagnostic orientation. The histopathological diagnosis, thus confusing where the biopsy is indicated. A review of the literature on benign lichenoid keratosis clinical, histopathology and dermascopy pattems is exposed.

Oral lichen planus versus oral lichenoid reaction: Difficulties in the diagnosis.

Lichen planus (LP) is a mucocutaneous disease with well-established clinical and microscopic features. The oral mucosa and skin may present clinical and microscopic alterations similar to those observed in LP, called lichenoid reactions (LRs), which are triggered by systemic or topical etiological agents. The difficulties faced to establish the differential diagnosis between the two pathologies were investigated in the literature. It was observed that the etiology of LP is still under discussion, with a tendency to self-immunity, while the etiology of LRs is related to the contact with specific agents, such as metallic restorative materials, resins, and drugs, allowing the establishment of a cause-effect relationship. In this case, the disease is caused by the antigen fixation in the epithelial cells, which are destructed by the immune system. Based on these data, protocols are suggested for this differentiation. The important role played by the integration between the clinician and the oral pathologist in the diagnostic process is highlighted. The treatment of LP comprises mainly the utilization of corticosteroids and the LR is treated by removal of the causal factor. Differentiation between the two diseases allows an effective and correct therapeutic approach.

Erupción liquenoide por reveladores a color: a propósito de un caso / Lichenoid eruption by color developers: a purpose of a case

Las erupciones liquenoides son un grupo de dermatosis con un cuadro semejante y en ocasiones indistinguible desde un punto de vista clínico e histológico al liquen plano. Se reporta el caso de un paciente masculino, de 46 años de edad, de ocupación fotógrafo con diagnóstico de erupción liquenoide por reveladores a color, enfermedad poco frecuente que se manifiesta con lesiones similares al liquen plano localizadas en zonas expuestas al producto industrial y se realiza revisión de la literatura

Liquen estriado: a proposito de seis nuevos casos / Striatus lichen: a propouse of six cases

El liquen estriado es una dermatosis adquirida, que sigue las líneas de Blaschko, de escasa frecuencia y que afecta sobre todo a niños con neto predominio por el sexp femenino. Se caracteriza por presentar una districución unilateral y leneal de pápulas liquenoides que asientan usualmente sobre las extremidades. Presentamos sus rasgos clínicos, antecedentes y posibles asociaciones