Dermal melanocytoses include a variety of congenital and acquired melanocytic lesions characterised by the presence of multiple spindle-shaped dendritic melanocytes in the dermis. These lesions are commonly found in the skin of Asians, but they can also appear in Caucasians. The Mongolian spot, nevi of Ota and Ito are the most common morphological forms. We report a case of a 24-year-old Caucas...

Abstract: This paper presents a new general synthesis method for high-order current mode Operational Transconductance Amplifiers and Capacitors, (OTA-C) filters. The method is based on the analytical solution of a single, nth-order generic filter transfer function and the generation of n, number of realizable transfer functions implemented using lossless integrators. The method provides systema...

Uveal melanoma is the most common primary intraocular malignancy in adults. The disease overwhelmingly affects white populations. Other risk factors include fair skin, light iris color, ancestry from northern latitudes, and ocular/oculodermal melanocytosis. Historically, enucleation was the definitive treatment of uveal melanoma, but brachytherapy and proton beam irradiation are now the most co...

A PATIENT is presented in whom a malignant melanoma of the choroid developed in association with a naevus of Ota. The naevus of Ota is quite common in Orientals but occurs far less frequently in Caucasians and Negroes. It is considered an aberrant or misplaced mongolian spot and it rarely undergoes malignant change. Apart from its rarity, malignant change has never been recorded in Orientals an...