β-Thalassemia: HBB (Known Mutation)

Casandra

Casandra Test Code LC62551Version 1 (DRAFT)

Performing Lab

Lab LabcorpLab Test ID 252827CPT Code 81362

β-Thalassemia: HBB (Known Mutation)

Clinical Use

Use

The β-Thalassemia: HBB (Known Mutation) test is utilized to detect the presence or absence of familial mutations in individuals who may be carriers or affected by β-thalassemia. It is specifically used when the mutation in question is known and can be documented by the ordering physician. This genetic test aids in the diagnosis and management of β-thalassemia, assisting clinicians in making informed decisions about patient care, particularly in family testing scenarios where a known mutation exists.

Special Instructions

This test option should be selected when the mutation is known and clearly documented by the healthcare provider. A detailed submission including an attestation of informed consent from the patient is a requirement. Furthermore, in cases involving family tests, results from the index case are needed if they were not initially processed at a LabCorp facility.

Limitations

The assay has limitations including its inability to reliably detect mosaic variants, deep intronic variants, large deletions, duplications, inversions, or other structurally complex genomic alterations. Its accuracy can be compromised by factors such as homopolymer repeats and allele-dropout due to sequence polymorphisms at primer binding sites. The test is unable to determine whether two heterozygous variants are located on the same or different chromosomes.

Test Details