Incidence of neonatal diabetes in Austria-calculation based on the Austrian Diabetes Register.
BACKGROUND
Neonatal diabetes mellitus (NDM) is a rare monogenic form of diabetes which is diagnosed in the first 6 months of life. Several studies in the last few years provide information on genetic causes for NDM.


OBJECTIVE
The aim of this study was to identify all patients with diabetes in the first 6 months of life through the Austrian Diabetes Register, which is available since 1989. A retrospective data analyses was performed to calculate the current incidence of NDM.


METHODS
Ten patients were registered with diabetes onset within the first 6 months of life in the Austrian Diabetes Register. Evaluation of detailed clinical data was performed by sending a questionnaire to all diabetes centers.


RESULTS
Ten patients from nine different families with NDM were diagnosed in Austria from 1989 until September 2007. Seven patients (one male, six females) had transient NDM (TNDM), three (two males, one female) showed a permanent course [permanent neonatal diabetes mellitus (PNDM)]. One had immunodeficiency, polyendocrinopathy and enteropathy X-linked (IPEX) syndrome and another showed aplasia of the pancreas; no genetic etiology was found in the third case. In three out of seven patients with a transient course of NDM a genetic diagnosis was possible. Two female siblings had activating point mutations in the ABCC8 gene, although one patient had paternal uniparental isodisomy of chromosome 6q24. One patient's family did not consent to genetic testing.


CONCLUSIONS
The incidence of NDM in Austria is 1/160 949, with an incidence of 1/ 536 499 for PNDM and 1/229 928 for TNDM.
Wiedemann
Barbara
B
Department of Pediatrics, Medical University of Innsbruck, 6020 Innsbruck, Austria.
Schober
Edith
E
Waldhoer
Thomas
T
Koehle
Julia
J
Flanagan
Sarah E
SE
Mackay
Deborah Jg
DJ
Steichen
Elisabeth
E
Meraner
Dagmar
D
Zimmerhackl
Lothar-Bernd
LB
Hattersley
Andrew T
AT
Ellard
Sian
S
Hofer
Sabine
S
D018528:ATP-Binding Cassette Transporters / Q000235:genetics; D001317:Austria / Q000453:epidemiology; D002896:Chromosomes, Human, Pair 6 / Q000235:genetics; D003920:Diabetes Mellitus / Q000453:epidemiology* / Q000235:genetics; D005260:Female; D006801:Humans; D015994:Incidence; D007231:Infant, Newborn; D008297:Male; D017354:Point Mutation; D024661:Potassium Channels, Inwardly Rectifying / Q000235:genetics; D011955:Receptors, Drug / Q000235:genetics; D012042:Registries; D012189:Retrospective Studies; D064233:Sulfonylurea Receptors; D024182:Uniparental Disomy / Q000235:genetics
D018528:ATP-Binding Cassette Transporters; D024661:Potassium Channels, Inwardly Rectifying; D011955:Receptors, Drug; D064233:Sulfonylurea Receptors