Validation of the SOPHiA DDM HRD Solution as a Companion Diagnostic for Poly (ADP-Ribose) Polymerase Inhibitor Access in Australia
- Author(s)
- Fellowes, AP; Choong, DYH; McEvoy, CR; Legaie, RA; Bell, AH; Fox, SB;
- Journal Title
- Journal of Molecular Diagnostics
- Publication Type
- Online publication before print
- Abstract
- In this multilaboratory validation study of 145 ovarian cancer samples, the SOPHiA DDM HRD Solution was compared with the regulatory-approved Myriad myChoice HRD assay to assess clinical comparability for class 3 in-house in vitro diagnostic medical device companion diagnostic use. BRCA1/2 mutation status showed 100% concordance, and genomic instability (GI) measurements demonstrated strong linear agreement, absence of bias, and high analytical precision. Receiver operating characteristic analysis suggested a threshold adjustment from 0 to -1.5, improving overall accuracy to 91.2% when combined with BRCA mutation status to assign homologous recombination deficiency (HRD) status. Approximately 6% of samples were excluded because of inconclusive results, whereas GI classification discordance was concentrated near the clinical threshold. Neither inconclusiveness nor discordance was associated with sample-related factors. These findings indicate that the SOPHiA HRD assay can provide results broadly interchangeable with Myriad myChoice, although caution is warranted when assigning HRD status to borderline GI values.
- Department(s)
- Pathology
- Publisher's Version
- https://doi.org/10.1016/j.jmoldx.2025.12.002
- Terms of Use/Rights Notice
- Refer to copyright notice on published article.
Creation Date: 2026-01-20 05:38:38
Last Modified: 2026-01-20 05:38:55