Marfanov syndróm je zriedkavé, systémové ochorenie spojivového tkaniva s postihnutím skeletu, kardiovaskulárneho systému a očí. Odhadovaná prevalencia sa v rôznych etnikách pohybuje od 1 : 3–5000. Na kazuistike 16-ročného chlapca s plne manifestnými známkami Marfanovho syndrómu a miernom fenotype u otca prezentujeme intrafamiliárnu fenotypovú variabilitu, nové diagnostické kritériá a autozómovo dominantný typ dedičnosti. U oboch sme potvrdili identickú, v literatúre dovtedy nepopísanú ,,splicing“ mutáciu c.7820-1G>A v géne FBN1 v heterozygotnom stave. Použitie genetických diagnostických testov pre definitívne potvrdenie diagnózy prispieva k zlepšeniu manažmentu komplexnej zdravotnej starostlivosti o pacientov s týmto potencionálne letálnym ochorením.

Marfan syndrome is a rare systemic disorder of the connective tissue affecting skeletal, cardiovascular system and also eyes. The estimated prevalence within different ethnic groups is 1:3–5,000. We provide intra-familiar phenotype variability, new diagnostic criteria and autosomal dominant inheritance information within casuistic of a 16-year old male subject with fully developed signs of Marfan syndrome and within gentle phenotype of his father. We managed to provide evidence of identical, up to now undefined, "splicing" mutation c.7820-1G>A within FBN1 gene in its heterozygous state. The actual usage of genetic diagnostic tests in order to confirm exact diagnosis significantly contributes to improvement of comprehensive health care management provided to subjects with this potentially fatal disorder.

Klinika lekárskej genetiky SZU a UNB Bratislava

MedGen s r o Bratislava

Intrafamiliar phenotype variability of classic Marfan syndrome