Pätau-Syndrom
Patau syndrome (also known as trisomy 13) is considered the 3 commonest autosomal trisomy.
Patau syndrome along with Down syndrome (trisomy 21) and Edward syndrome (trisomy 18) are the only three trisomies to be compatible with extrauterine life. However, few infants live more than a few days.
Epidemiology
The estimated incidence is approximately 1:6,000. There may be an increased incidence with advanced maternal age.
Clinical presentation
Described features are protean and include
- congenital heart disease: 50-80%
- central nervous system/head and neck abnormalities: 70%
- holoprosencephaly: most well known associated CNS anomaly: ~40-50%
- microcephaly
- fetal hydrocephalus
- enlarged cisterna magna
- agenesis of the corpus callosum
- persistent stapedial artery
- retinal dysplasia
- spinal anomalies
- intrauterine growth restriction (IUGR): tends to be early
- abnormal facies: 90%, strong marker
- skeletal abnormalities
- polydactyly: 70% (tends to be post-axial)
- rocker bottom feet
- clenched hands +/- overlapping digits
- abdominal wall abnormalities
- genitourinary anomalies
Pathology
Three forms are known
- free trisomy 13: classical form
- translocation trisomy 13
- mosaic trisomy 13
Markers
- reduced maternal serum alpha fetoprotein (MSAFP)
- reduced maternal beta HCG
- reduced PAPP-A
Associations
Radiographic features
Antenatal ultrasound
Many of the individual clinical features listed above may be seen on ultrasound. Other general features include:
- abnormal liquor volumes: either polyhydramnios (more common) or oligohydramnios
- evidence of IUGR: especially early
- increased nuchal thickness
- evidence of hydrops fetalis
- echogenic bowel
- echogenic chorda tendinae
Treatment and prognosis
The syndrome carries a poor prognosis with most individuals not surviving beyond in utero or soon after birth. Management is mainly supportive.
Differential diagnosis
Clinically, individuals with Meckel-Gruber syndrome may carry some features similar to that of trisomy 13.
Siehe auch:
- Spina bifida
- Polydaktylie
- Hydrops fetalis
- Balkenagenesie
- Mega Cisterna magna
- Hypertelorismus
- fetal hydrocephalus
- single umbilical artery
- Herzfehler
- Down-Syndrom
- cleft lip +/ - palate
- Mikrophthalmus
- ventricular septal defect (VSD)
- Trisomie 18
- Mikrognathie
- Mikrozephalie
- clenched hands
- persistent stapedial artery
- Kryptorchismus
- proboscis
- Oligohydramnion
- Holoprosencephalie
- Intrauterine Wachstumsretardierung
- Omphalozele
- Polyhydramnion
- nuchal thickness
- cyclopia
- cystic renal dysplasia
- Meckel-Syndrom
- Blasenekstrophie
- trisomy
- Hypotelorismus
- hypoplastic left heart syndrome (HLHS)
- overlapping digits
- echogenic bowel
- Pseudotrisomie-13-Syndrom
- Anophthalmie
- intra uterine growth restriction (IUGR)
- rockerbottom feet
- post-axial
und weiter:
- ventricular septal defect
- Ebstein anomaly
- trisomies
- congenital tracheo-oesophageal fistula
- aneuploidy
- Double outlet right ventricle
- Lippen-Kiefer-Gaumen-Spalte
- angeborene renale Anomalien
- chromosomale Anomalien
- Radiusaplasie
- postaxiale Polydaktylie
- Arrhinenzephalie
- orbital hypertelorism
- Kamptodaktylie
- Myelomeningozele
- dreigliedriger Daumen
- antenatal screening
- Varianten der Herzanatomie
- cebocephaly
- Golfballphänomen
- cantrell syndrome
- altered alpha fetoprotein levels
- congenital vertical talus
- dysencephalia spanchnocystica
- absent nasal bone
- ARPKD
- mono nostril
- enlarged echogenic fetal kidneys
- cephalocoele
- differential diagnosis of osteoporosis
- Persistierender hyperplastischer primärer Vitreus
- two vessel cord
