1. A semi-automated method of classifying a specimen for the presence of premalignant or malignant cells, comprising the steps of: a) treating a specimen with an immunochemical marker to provide a visual indication of cell proliferation; b) ranking individual objects in the specimen in an order according to the likelihood that each object has attributes consistent with a premalignant or malignant cell or cell cluster; c) selecting for display a set of said objects according to said ranking; and d) displaying images of said selected objects to facilitate review by an operator.