The Authors have applied the AgNOR technique to a series of normal and pathological human tissues fixed in neutral buffered formalin and methacarnoy and embedded in glycol-methacrylate. The results show the compatibility of the AgNOR technique with this embedding medium as well as the possibility to obtain an adequate visualization of the specific silver precipitates (AgNORs) on a unique focal plane without appreciable nuclear overlap, making thus the valuation of the AgNORs less subjective.