Τίτλος:
Mandibulofacial dysostosis (Treacher-Collins syndrome) in the fetus: Novel association with pectus carinatum in a molecularly confirmed case and review of the fetal phenotype
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
BACKGROUND: Treacher Collins syndrome is the most common mandibulofacial dysostosis of autosomal dominant or, rarely, recessive inheritance. Affected fetuses may be identified by prenatal ultrasound or diagnosed at autopsy in case of perinatal death or pregnancy termination. METHODS: We describe the ultrasonographic, autopsy, and molecular findings in a 25-week-gestation affected fetus, and review the clinical, prenatal, and postmortem findings in 15 previously reported fetal and perinatal cases. RESULTS: A nearly complete spectrum of the typical facial characteristics can be present by the early second trimester of gestation, including subtle defects such as lower eyelid colobomas. Mandibular hypoplasia and bilateral auricle defects were constant findings in the affected fetal population. Downslanting palpebral fissures were the second more common feature, followed by midface hypoplasia, polyhydramnios, and ocular defects. Association with Pierre Robin sequence was common (38%) in the reviewed series. Previously unreported pectus carinatum was noted in our case bearing a heterozygous TCOF1 mutation. Other unique reported findings include salivary gland hyperplasia, single umbilical artery, and tracheo-esophageal fistula, all in molecularly unconfirmed cases. CONCLUSION: Treacher Collins syndrome can be prenatally detected by ultrasound and should be included in the wide range of genetic syndromes that can be diagnosed at perinatal autopsy. Affected fetuses tend to have a more severe phenotype than living patients. The reported association of Treacher Collins syndrome type 1 with pectus carinatum expands the phenotype, provides information on genotype-phenotype correlation, and suggests possible pathogenetic interactions between neural crest cell disorders and the formation of the sternum that merit investigation. © 2013 Wiley Periodicals, Inc.
Συγγραφείς:
Konstantinidou, A.E.
Tassoulas, I.
Kallipolitis, G.
Gasparatos, S.
Velissariou, V.
Paraskevakou, H.
Περιοδικό:
Birth Defects Research Part A: Clinical and Molecular Teratology
Λέξεις-κλειδιά:
article; autopsy; case report; coloboma; disease association; downward palpebral slant; external ear malformation; eye disease; fetus; fetus echography; genotype phenotype correlation; gestation period; human; hydramnios; lower eyelid coloboma; male; mandible hypoplasia; mandibulofacial dysostosis; midface hypoplasia; molecular genetics; mutator gene; perinatal mortality; Pierre Robin syndrome; pigeon thorax; priority journal; salivary gland disease; salivary gland hyperplasia; second trimester pregnancy; single umbilical artery; tcof1 gene; tracheoesophageal fistula, Fistula, autopsy; cleft palate; fetus; micrognathia; pectus carinatum; Pierre Robin sequence; sonography; Treacher Collins syndrome, Adult; Face; Female; Fetal Diseases; Fetus; Genotype; Humans; Male; Mandibulofacial Dysostosis; Mutation; Nuclear Proteins; Phenotype; Phosphoproteins; Pregnancy; Pregnancy Trimester, Second; Ultrasonography, Prenatal
