The Normal Kidney Growth Rate During Year 1 of Life Is Variable and Age Dependent

Abstract

These data demonstrate that normal kidney growth is age dependent. A rapid but slowly decreasing growth rate during the first 7 months of life is followed by a more constant and lower rate. The data also suggest that unusually rapid growth, such as that which may occur in the normal contralateral kidney in unilateral obstruction, may also be age dependent, exceeding 5.0 mm. per month during the first 7 months of life and 2.0 mm. per month thereafter.

Sonographic Growth Charts for Kidney Length in Normal Korean Children: a Prospective Observational Study

“…In terms of renal growth according to age, it is known that the renal volume changes around 1 year of age ( 9 ), with a rapid but gradually decreasing growth rate observed in the initial 7 months after birth, followed by a constant and slower rate ( 15 ). In infants under 12 months, kidney length has been reported to be poorly estimated with an age-based simple formula ( 16 ).…”

Prenatal diagnosis of multicystic dysplastic kidney disease in the second trimester screening

“…Because of this size discrepancy, US diagnosis is based on the presence of multiple noncommunicating cysts rather than on the size of the kidney itself . One of the problems of measuring renal size is the fact that it is sometimes difficult to distinguish between the boundaries of the kidneys and the adrenal glands . Prenatally measuring the size of the contralateral healthy kidney, in an attempt to use it as a marker for the stage and function of MCDK, proved to be ineffective in spite of the occasional compensatory hypertrophy that have been reported .…”

“…In spite of the fact that the renal volume is the most accurate measurement parameter, 28 it is widely accepted to use the renal length instead because it is the most practical diameter to measure. We used the renal length as our method of measuring the size of the kidney.…”

Diagnostic anténatal de la dysplasie rénale multikystique: à propos de 18 cas

“…Mais, dans près de 40% des cas, on trouvera une pathologie controlatérale. En dépit du fait que le volume rénal est le paramètre de mesure le plus précis [12], il est largement accepté d’utiliser la longueur rénale à la place parce que c’est le diamètre le plus reproductible. Un des problèmes de mesure de la taille rénale est le fait qu’il est parfois difficile de distinguer les reins et les glandes surrénales.…”