Abstract: Background: Pigmented lesions on acral sites are common; clinical differentiation of nevi and early melanoma can be challenging. In these cases, dermoscopy can provide a more accurate diagnosis. Most dermoscopic patterns on acral skin have been described in Asian and European populations, while there are few studies in Latin American populations. Objectives: To determine the frequency of pigmented lesions in volar skin and their dermoscopic patterns in a Mexican population. Methods: An observational, descriptive, cross-sectional study was performed in Hispanic patients with the presence of at least one pigmented lesion on acral skin. Clinical and dermoscopic images were obtained. These were subsequently evaluated independently by two dermatologists trained and experienced in dermoscopy. Results: A total of 582 pigmented lesions on volar skin were diagnosed in 321 patients. Overall, prevalence of acral pigmented lesions on volar skin was 6.8%. For both observers, parallel furrows were the most frequent pattern described, but for observer 2, a lattice-like pattern was prevalent on the toes and a homogeneous pattern on the sides of the feet. There was lower inter-observer agreement, with a kappa index of 0.144. Study limitations: The lesions were not biopsied, so clinical-histological correlation could not be performed. The study did not correlate dermoscopic patterns with age. Conclusions. As previously reported by other authors, parallel furrows were the most frequently found dermoscopic pattern on palmoplantar skin.

Abstract: Purpura is defined as a visible hemorrhage in the skin or mucosa, which is not evanescent upon pressure. Proper classification allows a better patient approach due to its multiple diagnoses. Purpuras can be categorized by size, morphology, and other characteristics. The course varies according to the etiology, as do the diagnostic approach and treatment. This review discusses pigmented purpuras and some cutaneous vascular occlusion syndromes.

A case of a Eosinophilic Granuloma localized in the occipital bone was diagnosed and operated in a radical way. At postoperatory stage the evolution was satisfactory. Another lesión appeared later atthe selar area where a biopsy was taken, reporting Eosinophilic Granuloma treated with steroid drugs resolving the case completely, the case.

Se reporta el caso de un granuloma eosinófilo localizado en el hueso occipital del lado derecho que fue resecado quirúrgicamente en forma total, con una evolución satisfactoria. Después aparece otra lesión situada en la silla turca de la que se toma una biopsia la cual reporta granuloma eosinófilo. Tratándolo con esteroides en el posquirúrgico resolviéndose por completo.

The present report describes a case of a glioblastoma which affected both thalamic regions, mainly in the left side. Contrast MRI showed lesions situated in both thalamic regions having no continuity between each other. The patient was operated and a subtotal resection of 60% in both tumors was made. The histopathological study reported Glioblastoma Multiforme.

Se presenta el caso de un paciente con glioma talámico bilateral e independiente, con mayor afección del lado izquierdo. Esto se demuestra por resonancia magnética con gadolinio, confirmando que no hay continuidad entre ambas lesiones. Se somete a cirugía resecando un 60% aproximadamente, de ambos tumores. El estudio histopatológico reporta glioblastoma multiforme.