Abstract
Background
ADPKD is one of the most common inherited disorders, with high risk for end-stage renal disease. Numerous patients, however, have no relatives in whom this disorder is known and are unsure whether they may transmit the disease to their offsprings. The aim of this study was to evaluate whether germline mutation analysis adds substantial information to clinical symptoms for diagnosis of ADPKD in these patients.
Methods
Clinical data included renal function and presence of liver or pancreas cysts, heart valve insufficiency, intracranial aneurysms, colonic diverticles, and abdominal hernias. Family history was evaluated regarding ADPKD. Germline mutation screening of the PKD1 and PKD2 genes was performed for intragenic mutations and for large deletions.
Results
A total of 324 adult patients with ADPKD including 30 patients without a family history of ADPKD (sporadic cases) were included. PKD1 mutations were found in 24/30 and PKD2 mutations in 6 patients. Liver cysts were present in 14 patients and intracranial aneurysms in 2 patients. Fourteen patients (45%) had no extrarenal involvement. Compared to the 294 patients with familial ADPKD, the clinical characteristics and the age at the start of dialysis were similar in those with sporadic ADPKD.
Conclusion
The clinical characteristics of patients with sporadic and familial ADPKD are similar, but sporadic ADPKD is often overlooked because of the absence of a family history. Molecular genetic screening for germline mutations in both PKD1 and PKD2 genes is essential for the definitive diagnosis of ADPKD.
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Acknowledgments
This study is supported by the Else-Kroener-Fresenius Foundation Grant 2009_A75. We acknowledge the support of this study by the following institutions and colleagues: Nephrology Center Lüdenscheid Dr Olaf Loke, Dr. Christoph Mohler. Nephrology Center Iserlohn Dr. Johannes Bunia. Nephrology Center Freiburg Wirthstrasse: PD Dr. Annette Krämer-Guth, Dr. Michaela Königer, Dr. Gunnar Schaeffer. Nephrology Center Freiburg Schreiberstrasse: Dr. Johannes Donauer, Dr.Thomas Watter, Dr. Eckhard Schwertfeger, Dr. Kristin Breitenfeldt. Nephrology Centers Müllheim-Bad Krozingen-Schopfheim: Dr. Markus Cybulla, Dr. Maria Macner, Dr. Christine Reichert-Jünger, Privatdozent Dr. Martin Johannes Bek. Nephrology Center Emmendingen: Dr. Ludwig Funk, Dr. Horst-Dieter Löffler, Dr. Beate Friedrich. Nephrology Center Lahr Schillerstrasse: Dr. Jörg Baumert, Dr. Klaus Sodemann. Nephrology Center Lahr Gutleutstrasse.: Dr. Iris Lubrich-Birkner, Dr. Walter. Nephrology Center Achern: Dr. Thomas Bott, Dr. Ursula Heim, Dr. Christian Just. Nephrology Center Offenburg: Dr. Johannes Duttlinger, Dr. Klaus-Peter Stoll, Dr. Martin Hornberger, Dr. Bernd Geiss-Zirn, Dr. Roland Weghaupt, Dr. Frank Hagenah, Dr. Elsbeth Schillinger-Pokorny. Nephrology Center Rastatt: Dr. Karlfried Bratzel, Dr. Anne Braun-Süß, Dr. Dietrich Paatz. Nephrology Center Singen: Dr. Jochen Wilpert. Nephrology Center Villingen-Schwenningen: Dr. Thomas Weinreich, Dr. Felix Banthin, Dr. Christian Friedrichsohn, Dr. Irene von Henning, Dr. Walter Luft, Prof. Dr. HelmutReichel, Prof. Dr. Georg Schultze, PD Dr. Thomas Quaschning. Nephrology Center Lörrach: Dr. Martin Herb, Dr. Holger Endress. Nephrology Center Waldshut: Dr. Jörg Schnierda, Dr. Carsten Kurth. Nephrology Center Bruchsal: Dr. Dieter Baumann, Dr. Ralf Dikow, Dr. Nicole Allendorf-Ostwald, Dr. Johannes Törnig. Nephrology Center Bretten, Dr. Gerald Hock, Dr. Susanne Schorn. Nephrology Center Karlsruhe Südend Strasse: Dr. Martin Andre, Dr. Wolfgang Fischinger, Dr. Hans Georg Röder. Nephrology Center Karlsruhe Zeppelinstrasse: Hans Martin Seuffert, Dr R. Voegtle, Dr. R. Reyher. Städtische Krankenanstalten Karlsruhe: Dr. Helmut Felten, Prof. Dr. Martin Hausberg. Nephrology Center Baden Baden: Dr. Markus Lahl, Dr. Kronauer, Dr. Just, Dr. Michael Schäfer. Nephrology Center Radolfzell: Dr. Karl Henke, Dr. Kurt Amann; Dr. Ulrich Hahn; Dr. Hermann Schulz.
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Neumann, H.P.H., Bacher, J., Nabulsi, Z. et al. Adult patients with sporadic polycystic kidney disease: the importance of screening for mutations in the PKD1 and PKD2 genes. Int Urol Nephrol 44, 1753–1762 (2012). https://doi.org/10.1007/s11255-012-0125-0
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DOI: https://doi.org/10.1007/s11255-012-0125-0