摘要: Most spontaneous melanocytic tumors reported in rats are located the skin. They appear as tiny black spots or raised firm nodules generally less than 1 cm diameter local, dark-stained, diffuse, irregularly delineated, thickened areas of Ulceration and crust formation common. When uveal tract, protrusion eye bulb, conjunctival discharge, corneal opacities may occur (see p.78).