Protocol Number: 01-HG-0094

Title:

Molecular Analysis of Microphthalmia/Anophthalmia and Related Disorders

Number:

01-HG-0094

Summary:

This study will try to learn more about the genetic cause and symptoms of microphthalmia (small eyes) or anophthalmia (absence of one or both eyes).

Patients with microphthalmia or anophthalmia with mental retardation may be eligible for this study. Patients' parents and siblings will also be included for genetic studies. Patients may participate in both the clinical and laboratory parts of the study or just the laboratory part, as described below:

Laboratory

The laboratory study consists of DNA analysis to determine the genetic cause of microphthalmia/anophthalmia. The DNA sample is obtained using one of the following methods:

-Blood draw - for young children, a numbing cream is applied to the skin before the needlestick to decrease the pain

-Skin biopsy - a small piece of skin (about 1/8-inch in diameter) is removed surgically after the area has been numbed with an anesthetic

-Cotton swab - a specimen is collected from inside the cheek using a cotton swab. This is done only for patients who cannot provide a blood or skin sample.

-Prenatal sample - If, in the case of newborns, specimens are left from prenatal testing, these can be used instead of a blood sample.

Some patients may have a permanent cell line grown from the blood or skin sample for use in future research tests.

Clinical

For the clinical study, participants undergo some or all of the following procedures at the NIH Clinical Center:

-Physical examination

-Clinical photographs, X-rays, blood tests

-Magnetic resonance imaging (MRI) scan of the brain - a diagnostic procedure that uses a magnetic field and radio waves instead of X-rays to produce images of the brain

Sponsoring Institute:

National Human Genome Research Institute (NHGRI)

Recruitment Detail

Type: Participants currently recruited/enrolled

Gender: Male & Female

Referral Letter Required: No

Population Exclusion(s): None

Eligibility Criteria:

INCLUSION CRITERIA:

Inclusion criteria will consist of affected individuals with unilateral or bilateral microphthalmia/anophthalmia from families with an X-linked mode of transmission. In addition, we may analyze patients with mental retardation with or without eye defects to allow genotype phenotype correlation studies. Parents and siblings will be included for linkage analysis. Unaffected non-transmitting parents may be included to clarify haplotype status. In addition, families with X-linked microphthalmia/anophthalmia with associated anomalies such as Lenz dysplasia and other X-linked microphthalmia/anophthalmia syndromes will be analyzed to determine if these conditions are allelic. Sporadic cases of microphthalmia with or without mental retardation may be considered for study, along with parents and unaffected siblings. Unaffected subjects may also be enrolled if needed for controls.

Specimens from patients collected at outside institutions may be accepted into the study if they were collected under an IRB-approved protocol at a multiple project assurance (FWA) institution or if the IRB waives review of the study and allows usage of the NIH consent. Some of these patient samples may represent overlapping phenotypes (e.g., laterality defects) and not microphthalmia. Inheritance patterns may not be known for these.

EXCLUSION CRITERIA:

If the patient has microphthalmia/anophthalmia with autosomal recessive, autosomal dominant pattern of inheritance, the family will be excluded. While this criterion should enrich for X-linked syndromic microphthalmia, the rarity of the disorder necessitates that we will accept small families and even sporadic cases if they have substantial clinical overlap with Lenz or OFCD.

Special Instructions:

Currently Not Provided

Keywords:

X-Linked

Heterogeneous

Embryologic Development

Mental Retardation

Brain Development

Microphthalmia

Anophthalmia

Malformations

Recruitment Keyword(s):

Lenz Dysplasia

Mental Retardation

Microphthalmia/Anophthalmia

Mutation Screening

Gene Characterization

Condition(s):

Anophthalmos

Investigational Drug(s):

None

Investigational Device(s):

None

Intervention(s):

None

Supporting Site:

National Human Genome Research Institute

Contact(s):

Patient Recruitment and Public Liaison Office
Building 61
10 Cloister Court
Bethesda, Maryland 20892-4754
Toll Free: 1-800-411-1222
TTY: 301-594-9774 (local),1-866-411-1010 (toll free)
Fax: 301-480-9793

Electronic Mail:prpl@mail.cc.nih.gov

Citation(s):

Clinical anophthalmos in a family

X-linked microcephaly, microphthalmia, microcornea, congenital cataract, hypogenitalism, mental deficiency, growth retardation, spasticity: possible new syndrome

Sex-linked hereditary bilateral anophthalmos Pathologic and radiologic correlation

• Questions about participating in a study, please contact the Patient Recruitment and Public Liaison Office, CC.
• Technical questions regarding the Clinical Center web site, please contact the Department of Clinical Research Informatics, CC.

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National Institutes of Health Clinical Center Bethesda, Maryland 20892. Last update: 01/13/2009