CPT® Code 81242

The CPT® Code 81242 pertains to the molecular genetic testing aimed at identifying a specific mutation in the FANCC (Fanconi anemia, complementation group C) gene, which is associated with Fanconi anemia, type C. This condition is an autosomal recessive inherited disorder caused by mutations in the FANCC gene located on chromosome 9 at position 22,3. Individuals who inherit mutations from both parents are at risk of developing Fanconi anemia, while those who inherit the mutation from only one parent become carriers of the disease. The IVS4+4A>T variant is particularly prevalent among individuals of Ashkenazi Jewish descent, where the manifestations of the disease may be more pronounced. The FANCC gene plays a critical role in cellular processes, including delaying apoptosis (the programmed cell death) and facilitating DNA repair and recombination. When mutations occur in this gene, it leads to significant cellular dysfunction, characterized by cytogenetic instability, hypersensitivity to DNA-damaging agents, and defective DNA repair mechanisms. As a result, individuals with Fanconi anemia often experience severe health complications, including pancytopenia—a reduction in red blood cells, white blood cells, and platelets—and a heightened risk of developing malignancies. The average lifespan of individuals affected by this condition is notably reduced, typically ranging from 20 to 30 years. Additionally, Fanconi anemia is frequently associated with congenital anomalies, which may include heart, kidney, and skeletal defects, as well as distinctive skin pigmentation changes. The necessity for molecular genetic testing arises in cases where individuals exhibit symptoms indicative of Fanconi anemia or have a family history of the disorder, thereby facilitating early diagnosis and management of the condition.