Cytogenetics For Fanconi Anemia

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The Cytogenetics Test for Fanconi Anemia is a specialized diagnostic test used to detect chromosomal instability associated with Fanconi Anemia (FA)—a rare inherited genetic disorder. The test involves exposing the patient’s blood cells (typically lymphocytes) to DNA-damaging agents like DEB (Diepoxybutane) or MMC (Mitomycin C). Cells from individuals with FA exhibit increased chromosomal breakage and rearrangements in response to these agents. This is a gold-standard cytogenetic test for confirming a diagnosis of Fanconi Anemia.

Description

Why It’s Done

This test is recommended to:
• Confirm a diagnosis of Fanconi Anemia in individuals showing signs such as:
o Bone marrow failure (aplastic anemia)
o Congenital abnormalities (e.g., skeletal defects, short stature)
o Skin pigmentation changes
o Developmental delays
• Distinguish Fanconi Anemia from other causes of pancytopenia or bone marrow disorders.
• Screen siblings or family members if a genetic history of FA is present.
• Guide treatment planning, including decisions about bone marrow transplantation.

Preparation

• No special preparation is typically required.
• A blood sample (or sometimes skin biopsy in certain cases) is collected for testing.
• Inform your doctor of any family history of anemia, birth defects, or genetic disorders.
• If the patient has recently received a blood transfusion, the doctor may recommend delaying the test or using an alternative tissue source like skin fibroblasts.