CPT® Code 81287

The CPT® Code 81287 pertains to the analysis of the MGMT (O-6-methylguanine-DNA methyltransferase) gene promoter methylation, specifically in the context of glioblastoma multiforme, which is recognized as a prevalent and aggressive form of malignant brain tumor. This procedure involves the examination of paraffin-embedded biopsy tissue samples to determine the methylation status of the MGMT gene promoter. The significance of this analysis lies in its potential to influence treatment decisions, particularly regarding the use of alkylating chemotherapy agents such as Temodar (temozolomide). The MGMT enzyme plays a critical role in DNA repair by reversing the alkylation of guanine, a process that, when disrupted due to promoter methylation, can lead to an accumulation of alkylguanine DNA. This accumulation results in erroneous base pairings with thymine, ultimately causing DNA damage and triggering cell death. The assessment of MGMT gene promoter methylation can be performed using advanced techniques such as methylation-specific polymerase chain reaction (PCR) or pyrosequencing methylation assays, which provide precise insights into the methylation status and its implications for patient prognosis and treatment response.