In urine analysis, renal tubular epithelial (RTE) cells of the collecting duct are identified by what feature?

Renal tubular epithelial (RTE) cells of the collecting duct are primarily identified by their cuboidal form. This specific shape is characteristic of the epithelial cells lining the collecting ducts in the kidney, reflecting their functional role in the reabsorption of water and solutes, as well as urine concentration. The cuboidal shape allows for a greater surface area, which is essential for the incorporation of various transport proteins and channels necessary for these processes.

Other features that may differentiate RTE cells can include their cytoplasmic composition and the presence of specific cellular organelles, but the defining morphological feature remains the cuboidal structure. Understanding this morphological aspect helps in the identification and classification of various cell types found in urinary sediments during analysis. In contrast, features like a round shape, large size, or a flat structure do not accurately depict the characteristics of RTE cells and are associated with other types of cells or structures in the urinary sediment.