The depth was zoomed in to adjust for a perfect image of the medullary pyramids. If necessary, we increased the focus degree but not the number of foci that were placed at the level of kidney.
The renal parenchymal thickness is the sum of the thicknesses of the cortex and the medullary pyramids. Therefore, MPT must also be assessed to calculate the functional unit, i.e.
To the best of our knowledge, there has been no study with a large sample size investigating the morphology of kidneys, including "renal medullary pyramid length, kidney size and parenchymal thickness" in newborns.
The primary purpose of the present study was to investigate the relationship between neonatal kidney dimensions and medullary pyramid thicknesses (MPTs) according to the weight, length (NL) and body mass index (BMI) of newborns in a large series.
Renal medullary pyramid length was also measured in the longitudinal plane.
Contrast-enhanced US (CEUS) can be a useful tool to confirm the normal cortical tissue interposed between medullary pyramids (Figures 2(b) and 2(c)).
Postpyelonephritic renal scars can be easily distinguished because they usually overlay the medullary pyramids with calyceal clubbing due to the retraction of the papilla from the scar (Figure 8).
Normal renal column (arrow); medullary pyramid (MP); renal cortex (c).