The fine structure of cutaneous papilloma in the dog was studied in two biopsy specimens fixed in formalin, postfixed in osmium tetroxide, and processed through the Epon embedding technic. The most prominent changes were found in the nuclei of epidermal cells, especially in the granular layer of neoplastic fronds. The affected nuclei contained inclusion bodies in various stages of morphologic d...

The morphologic features of third-passage human trabecular cells were examined in multiple experiments by light and electron microscopy. Evaluation of the cellular growth pattern, fibronectin immunofluorescence, and specific ultrastructural features have helped to establish the identity of the trabecular cell type. Comparison of the cultured trabecular cells with cultured keratocytes and sclera...