# Limit of detection (LOD) for the TruSight Oncology 500 (TSO500) ctDNA assay

**What is the limit of detection (LOD) for the TSO500 ctDNA assay?**

See the [TruSight Oncology 500 ctDNA data sheet](https://www.illumina.com/content/dam/illumina/gcs/assembled-assets/marketing-literature/trusight-oncology-500-ctdna-data-sheet-m-gl-00843/trusight-oncology-500-ctdna-data-sheet-m-gl-00843.pdf) for more information on the limits of detection by variant type.

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