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03.09.2018 | Original Article

Structural renal abnormalities in the DICER1 syndrome: a family-based cohort study

verfasst von: Nicholas E. Khan, Alexander Ling, Molly E. Raske, Laura A. Harney, Ann G. Carr, Amanda Field, Anne K. Harris, Gretchen M. Williams, Louis P. Dehner, Yoav H. Messinger, D. Ashley Hill, Kris Ann P. Schultz, Douglas R. Stewart

Erschienen in: Pediatric Nephrology | Ausgabe 12/2018

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Abstract

Background

The DICER1 syndrome is a tumor-predisposition disorder caused by germline pathogenic variation in DICER1 and is associated with cystic nephroma and other renal neoplasms. Dicer1 mouse and rare human DICER1 syndrome case reports describe structural kidney and collecting system anomalies. We investigated renal function and the frequency of structural abnormalities of the kidney and collecting system in individuals with germline loss-of-function variants in DICER1.

Methods

In this family-based cohort study, prospectively ascertained germline DICER1-mutation carriers (DICER1-carriers) and unaffected family controls were evaluated at the National Institutes of Health Clinical Center with renal ultrasound and comprehensive laboratory testing. Two radiologists reviewed the imaging studies from all participants for structural abnormalities, cysts, and tumors.

Results

Eighty-nine DICER1-carriers and 61 family controls were studied. Renal cysts were detected in 1/33 DICER1-carrier children without history of cystic nephroma. Similar proportions of adult DICER1-carriers (8/48; 17%) and controls (11/50; 22%) had ultrasound-detected renal cysts (P = 0.504). 8/89 (9%) DICER1-carriers harbored ultrasound-detected structural abnormalities of varying severity within the collecting system or kidney, nephrolithiasis, or nephrocalcinosis. None of the family controls (0/61) had similar findings on ultrasound (P = 0.02). No meaningful differences in renal laboratory values between DICER1-carriers and unaffected family controls were observed.

Conclusions

Our report is the first to systematically characterize renal function and anatomy in a large prospective cohort of DICER1-carriers and DICER1-negative family controls. DICER1-carriers may be at increased risk of structural anomalies of the kidney or collecting system. The role for DICER1 in renal morphogenesis merits additional investigation.

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Titel: Structural renal abnormalities in the DICER1 syndrome: a family-based cohort study
verfasst von: Nicholas E. Khan
Alexander Ling
Molly E. Raske
Laura A. Harney
Ann G. Carr
Amanda Field
Anne K. Harris
Gretchen M. Williams
Louis P. Dehner
Yoav H. Messinger
D. Ashley Hill
Kris Ann P. Schultz
Douglas R. Stewart
Publikationsdatum: 03.09.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: Pediatric Nephrology / Ausgabe 12/2018
Print ISSN: 0931-041X
Elektronische ISSN: 1432-198X
DOI: https://doi.org/10.1007/s00467-018-4040-1

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Structural renal abnormalities in the DICER1 syndrome: a family-based cohort study