Genetic Analysis of Fraser Syndrome and Fryns Syndrome
Completed
Conditions studied: Fraser Syndrome, Fryns Syndrome, Chromosomal Abnormalities, Abnormalities, Multiple
In brief
This study will examine blood or other tissue samples from patients with Fraser syndrome and patients with Fryns syndrome to try to identify the gene responsible for these diseases. Fraser syndrome is characterized by congenital abnormalities including cryptophthalmos (lack of eyelid formation), syndactyly (webbed fingers or toes) and abnormal genitalia. Patients may also have abnormalities of the nose, ears and larynx (voice box), cleft lip or palate, and kidney agenesis. Fryns syndrome is characterized by hernia through the diaphragm, cloudy cornea, coarse facial features, cleft lip or palate, abnormal fingers and toes, heart, kidney and brain malformations and hydrocephalus (accumulation of fluid around the brain). This protocol consists of laboratory study only; it does not involve patient care or patient counseling. Patients with Fraser syndrome or Fryns syndrome are eligible for this study. Parents and healthy siblings of patients will also be included for genetic study, and parents of children with undiagnosed multiple congenital anomalies syndromes will be included for comparison study. Participants will provide a blood sample (about 8 to 10 teaspoons from adults; 1 to 3 teaspoons from children) or sample of skin cells collected by swabbing the inner surface of the cheek. Some patients may undergo a skin biopsy, in which a small skin sample (about 1/8-inch in diameter) is surgically removed. The tissue samples will be used to obtain DNA (genetic material) for laboratory testing. A permanent cell line-a collection of cells grown in the laboratory from the original tissue specimen-will also be established to enable additional testing in the future.
Key facts
- Study ID
- NCT00032877
- Run by
- National Human Genome Research Institute (NHGRI)
- People needed
- 400
- Starts
- 2002-04-01
- Expected to finish
- 2003-02-01
- Last updated by the study team
- 2008-03-04
Who can join
Age: any. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- For Fraser syndrome, clinical criteria for inclusion will be by:
- Satisfying diagnostic criteria for Fraser syndrome. These are at least two major criteria and one minor criterion (listed below) or one major criterion and four minor criteria.
- Major criteria:
- Cryptophthalmos
- Syndactyly
- Abnormal genitalia
- Sib with cryptophthalmos syndrome
- Minor criteria:
- Congenital malformation of the nose
- Congenital malformations of the ears
- Congenital malformation of the larynx
- Cleft lip and/or palate
- Skeletal defects
- Umbilical hernia
- Renal agenesis
- Mental retardation
- Cryptophthalmos with additional anomalies consistent with the phenotypic spectrum of Fraser syndrome but without satisfying diagnotisic for Fraser syndrome may also be considered sufficient for inclusion.
- For Fryns syndrome, formal diagnostic criteria have not been published. The clinical criteria for inclusion will be:
- Diaphragmatic hernia with at least one additional anomaly found in the spectrum of Fryns syndrome, including cleft lip and or palate, renal or genital malformations, cerebral malformations or hydrocephalus, corneal clouding, craniofacial dysmorphism and brachydactyly or nail hypoplasia, pulmonary agenesis or microphthalmia.
- Patients with four or more of the additional anomalies may be included in the study.
- Parents and unaffected siblings will be also included for linkage analysis.
- Specimens of DNA or whole blood for DNA extraction collected outside the NIH may be accepted into the study if they are obtained through an approved NIH protocol consent form.
Where it is running
- National Human Genome Research Institute (NHGRI) — Bethesda, Maryland, United States
Full record on ClinicalTrials.gov
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