APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Normally this lobulated structure of kidney remains apparent at birth and it gradually disappears during infancy as the nephrons grows and fully disappear over the rst 5 years of life [4, 5].

Detailed explanation-2: -The lobulation usually remains until the end of the fetal period, becoming un-noticeable during the 3rd trimester and resulting in a smooth renal surface. Incomplete fusion of interlobular folds can result in the appearance of persistent fetal lobulation (4, 6).

Detailed explanation-3: -Lobulation of the kidney appears at 10 weeks and can be seen throughout the fetal life. Arcades system is observed at 16 to 18 weeks along with well defined pyramids.

Detailed explanation-4: -Persistent fetal lobulation is a rare developmental variant characterised by fine linear demarcations indenting renal surface and are comprised of a central pyramid with surrounding cortex.

Detailed explanation-5: -Fetal lobulation, also known as fetal lobation, of the kidney is evident on scanning. Fetal lobation is a normal stage in the development of the kidney. In the adult a normal anatomic variant is that of persistent fetal lobulation of the kidney that may be mistaken for a tumour.