CPT® Code 88248

Chromosome analysis for breakage syndromes; baseline breakage, score 50-100 cells, count 20 cells, 2 karyotypes (eg, for ataxia telangiectasia, Fanconi anemia, fragile X)

A chromosome analysis for breakage syndromes, as described by CPT® Code 88248, involves a detailed examination of chromosomes to identify specific genetic abnormalities associated with conditions such as ataxia telangiectasia, Fanconi anemia, and fragile X syndrome. This analysis is crucial for diagnosing breakage syndromes, which are characterized by an increased susceptibility to chromosome breakage, leading to various health issues. The procedure entails culturing peripheral blood lymphocytes, which are white blood cells that play a vital role in the immune response. These cells are stimulated to divide using specific antigens, allowing for the observation of chromosomes during the metaphase stage of cell division. During the analysis, a baseline breakage score is established by evaluating 50 to 100 cells, with a detailed count of 20 cells to ensure accuracy in identifying chromosomal abnormalities. The process includes performing two karyotypes, which are comprehensive assessments of the size, shape, and number of chromosomes present in the cultured cells. Karyotyping employs various staining techniques, such as Giemsa banding, to visualize the chromosomes and identify any structural anomalies, including extra or missing chromosome segments. This meticulous approach enables healthcare professionals to detect and characterize breakage syndromes effectively, facilitating appropriate clinical management and genetic counseling for affected individuals.