81243 FMR1 (fragile X mental retardation 1) (eg, fragile X mental retardation) gene analysis; evaluation to detect abnormal (eg, expanded) alleles

Name of the Procedure:

FMR1 Gene Analysis for Fragile X Syndrome Evaluation

Summary

The FMR1 gene analysis is a genetic test used to evaluate whether an individual has abnormalities in the FMR1 gene, which can indicate fragile X syndrome. This test specifically looks for expanded alleles (mutations) in the FMR1 gene.

Purpose

The FMR1 gene analysis is primarily used to diagnose fragile X syndrome, a genetic disorder that can cause intellectual disabilities, behavioral and learning challenges, and physical features changes. The goal is to detect the presence of unstable (expanded) alleles in the FMR1 gene, which are responsible for the condition.

Indications

• Individuals showing symptoms of intellectual disability or developmental delay.
• Patients with behavioral issues such as autism spectrum disorders.
• Family history of fragile X syndrome or related disorders.
• Women with unexplained infertility or premature ovarian failure.

Preparation

• No fasting or specific dietary restrictions are required.
• Patients may be asked to provide a detailed medical and family history prior to the test.
• A simple blood sample may be needed, hence staying hydrated and ensuring easy blood flow can be beneficial.

Procedure Description

1. A blood sample is collected, typically from the arm.
2. The sample is sent to a laboratory for DNA extraction.
3. Specialized techniques, such as PCR (Polymerase Chain Reaction) and Southern Blot Analysis, are used to examine the FMR1 gene.
4. The results are analyzed to determine if expanded alleles are present in the gene.

Duration

The blood draw itself takes only a few minutes. The laboratory analysis can take several days to a few weeks, depending on the complexity of the test and the laboratory's schedule.

Setting

• The blood draw can be performed in a doctor's office, outpatient clinic, or hospital.
• The genetic analysis is conducted in a specialized laboratory.

Personnel

• A phlebotomist or nurse to draw the blood.
• Geneticist or laboratory technician to perform the analysis.
• Genetic counselor or physician to discuss the results.

Risks and Complications

• Minimal risk associated with the blood draw, including slight pain, bruising, or infection at the puncture site.
• Rarely, patients might feel lightheaded or faint during the blood draw.

Benefits

• Accurate diagnosis of fragile X syndrome or the identification of carriers.
• Helps in planning educational and therapeutic interventions for affected individuals.
• Informs family planning decisions for at-risk families.

Recovery

• No significant recovery time is needed after the blood draw.
• Patients can resume daily activities immediately.
• Follow-up might be required to discuss the results with a genetic counselor or physician.

Alternatives

• Other forms of genetic testing may be recommended based on clinical indications, such as chromosomal microarray analysis.
• Developmental and behavioral assessments may be used as supportive diagnostic tools but are not specific for fragile X syndrome.

Patient Experience

• Mild discomfort during the blood draw, similar to any standard blood test.
• Anxiety might be experienced while waiting for results due to the implications of the diagnosis.
• Genetic counseling is typically recommended to support patients and families through the process, providing detailed information and emotional support.