Findings

In this survey image, the area cribrosa with large papillary ducts in the renal papilla is seen. The papillary ducts empty their contents into the minor calyx which represents the first part of the urinary excretory passage.

Comment

The minor calyces and the rest of the urinary passages are lined with transitional epithelium, which is not present in the various tubules of the renal parenchyma.

Preparation

Paraffin section; Masson's trichrome

View

Low-power light microscopy

Specimen

Renal papilla

Image Credit

V. Eroschenko, Ph.D.
Department of Biological Sciences
WAMI Medical Program
University of Idaho