Precision Oncology
Limitations of Genomic Testing
The limitations of NGS testing are real and worth understanding. They do not cancel the clinical value -- they define the conditions under which results should be interpreted. Standard DNA panels may miss gene fusions better detected by RNA sequencing. A single biopsy samples one region at one timepoint. Liquid biopsy has reduced sensitivity in low-shedding tumours. A negative result means not detected -- not definitively absent.