Intranuclear rodlets in a pulmonary neuroepithelial body of a rabbit.

Filamentous intranuclear rodlets were found in a majority of cells in a bronchiolar neuroepithelial body of a rabbit. These rodlets appear to be similar to structures that have been described primarily in neural tissues. They are composed of large bundles of microfibrils made up of smaller subbundles. No close association with any nuclear structure is seen. Although no function can as yet be ascribed to intranuclear rodlets, their demonstration in a neuroepithelial body may be of importance of the understanding of the function of both structures.